Home / 129,142.14-178,196.40-72,542.58

Finding the Fourth Proportional to 129,142.14, 178,196.40 and 72,542.58

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Solution

The fourth proportional to 129,142.14, 178,196.40 and 72,542.58 is: 100,097.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,142.14 : 178,196.40 = 72,542.58 : x
  2. Step 2: Convert to fraction form
    129,142.14/178,196.40 = 72,542.58/x
  3. Step 3: Cross multiply
    129,142.14x = 178,196.40 × 72,542.58
  4. Step 4: Simplify right side
    129,142.14x = 12,926,826,602.71
  5. Step 5: Solve for x
    x = 12,926,826,602.71/129,142.14
  6. Step 6: Final answer
    x = 100,097.66

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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.