Home / 105,299.20-145,279.04-75,089.60

Finding the Fourth Proportional to 105,299.20, 145,279.04 and 75,089.60

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Solution

The fourth proportional to 105,299.20, 145,279.04 and 75,089.60 is: 103,599.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,299.20 : 145,279.04 = 75,089.60 : x
  2. Step 2: Convert to fraction form
    105,299.20/145,279.04 = 75,089.60/x
  3. Step 3: Cross multiply
    105,299.20x = 145,279.04 × 75,089.60
  4. Step 4: Simplify right side
    105,299.20x = 10,908,945,001.98
  5. Step 5: Solve for x
    x = 10,908,945,001.98/105,299.20
  6. Step 6: Final answer
    x = 103,599.51

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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.