Home / 129,017.92-178,044.60-72,429.40

Finding the Fourth Proportional to 129,017.92, 178,044.60 and 72,429.40

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Solution

The fourth proportional to 129,017.92, 178,044.60 and 72,429.40 is: 99,952.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,017.92 : 178,044.60 = 72,429.40 : x
  2. Step 2: Convert to fraction form
    129,017.92/178,044.60 = 72,429.40/x
  3. Step 3: Cross multiply
    129,017.92x = 178,044.60 × 72,429.40
  4. Step 4: Simplify right side
    129,017.92x = 12,895,663,551.24
  5. Step 5: Solve for x
    x = 12,895,663,551.24/129,017.92
  6. Step 6: Final answer
    x = 99,952.50

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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.