Home / 129,302.28-178,435.80-72,714.24

Finding the Fourth Proportional to 129,302.28, 178,435.80 and 72,714.24

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Solution

The fourth proportional to 129,302.28, 178,435.80 and 72,714.24 is: 100,344.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,302.28 : 178,435.80 = 72,714.24 : x
  2. Step 2: Convert to fraction form
    129,302.28/178,435.80 = 72,714.24/x
  3. Step 3: Cross multiply
    129,302.28x = 178,435.80 × 72,714.24
  4. Step 4: Simplify right side
    129,302.28x = 12,974,823,585.79
  5. Step 5: Solve for x
    x = 12,974,823,585.79/129,302.28
  6. Step 6: Final answer
    x = 100,344.89

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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.