Home / 129,601.28-178,828.10-72,228.04

Finding the Fourth Proportional to 129,601.28, 178,828.10 and 72,228.04

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Solution

The fourth proportional to 129,601.28, 178,828.10 and 72,228.04 is: 99,662.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,601.28 : 178,828.10 = 72,228.04 : x
  2. Step 2: Convert to fraction form
    129,601.28/178,828.10 = 72,228.04/x
  3. Step 3: Cross multiply
    129,601.28x = 178,828.10 × 72,228.04
  4. Step 4: Simplify right side
    129,601.28x = 12,916,403,159.92
  5. Step 5: Solve for x
    x = 12,916,403,159.92/129,601.28
  6. Step 6: Final answer
    x = 99,662.62

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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.