Home / 105,423.04-145,397.19-75,198.70

Finding the Fourth Proportional to 105,423.04, 145,397.19 and 75,198.70

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Solution

The fourth proportional to 105,423.04, 145,397.19 and 75,198.70 is: 103,712.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,423.04 : 145,397.19 = 75,198.70 : x
  2. Step 2: Convert to fraction form
    105,423.04/145,397.19 = 75,198.70/x
  3. Step 3: Cross multiply
    105,423.04x = 145,397.19 × 75,198.70
  4. Step 4: Simplify right side
    105,423.04x = 10,933,679,671.65
  5. Step 5: Solve for x
    x = 10,933,679,671.65/105,423.04
  6. Step 6: Final answer
    x = 103,712.43

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.