Home / 129,315.61-178,428.79-75,590.24

Finding the Fourth Proportional to 129,315.61, 178,428.79 and 75,590.24

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Solution

The fourth proportional to 129,315.61, 178,428.79 and 75,590.24 is: 104,298.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,315.61 : 178,428.79 = 75,590.24 : x
  2. Step 2: Convert to fraction form
    129,315.61/178,428.79 = 75,590.24/x
  3. Step 3: Cross multiply
    129,315.61x = 178,428.79 × 75,590.24
  4. Step 4: Simplify right side
    129,315.61x = 13,487,474,261.35
  5. Step 5: Solve for x
    x = 13,487,474,261.35/129,315.61
  6. Step 6: Final answer
    x = 104,298.89

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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.