Home / 129,374.05-178,531.54-72,011.47

Finding the Fourth Proportional to 129,374.05, 178,531.54 and 72,011.47

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Solution

The fourth proportional to 129,374.05, 178,531.54 and 72,011.47 is: 99,373.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,374.05 : 178,531.54 = 72,011.47 : x
  2. Step 2: Convert to fraction form
    129,374.05/178,531.54 = 72,011.47/x
  3. Step 3: Cross multiply
    129,374.05x = 178,531.54 × 72,011.47
  4. Step 4: Simplify right side
    129,374.05x = 12,856,318,636.76
  5. Step 5: Solve for x
    x = 12,856,318,636.76/129,374.05
  6. Step 6: Final answer
    x = 99,373.24

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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.