Home / 129,158.77-178,232.25-72,566.50

Finding the Fourth Proportional to 129,158.77, 178,232.25 and 72,566.50

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Solution

The fourth proportional to 129,158.77, 178,232.25 and 72,566.50 is: 100,137.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,158.77 : 178,232.25 = 72,566.50 : x
  2. Step 2: Convert to fraction form
    129,158.77/178,232.25 = 72,566.50/x
  3. Step 3: Cross multiply
    129,158.77x = 178,232.25 × 72,566.50
  4. Step 4: Simplify right side
    129,158.77x = 12,933,690,569.63
  5. Step 5: Solve for x
    x = 12,933,690,569.63/129,158.77
  6. Step 6: Final answer
    x = 100,137.92

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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.