Home / 129,372.69-178,534.28-72,010.77

Finding the Fourth Proportional to 129,372.69, 178,534.28 and 72,010.77

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Solution

The fourth proportional to 129,372.69, 178,534.28 and 72,010.77 is: 99,374.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,372.69 : 178,534.28 = 72,010.77 : x
  2. Step 2: Convert to fraction form
    129,372.69/178,534.28 = 72,010.77/x
  3. Step 3: Cross multiply
    129,372.69x = 178,534.28 × 72,010.77
  4. Step 4: Simplify right side
    129,372.69x = 12,856,390,614.14
  5. Step 5: Solve for x
    x = 12,856,390,614.14/129,372.69
  6. Step 6: Final answer
    x = 99,374.84

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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.