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Finding the Fourth Proportional to 172,428.18, 258,639.24 and 77,591.24

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Solution

The fourth proportional to 172,428.18, 258,639.24 and 77,591.24 is: 116,385.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,428.18 : 258,639.24 = 77,591.24 : x
  2. Step 2: Convert to fraction form
    172,428.18/258,639.24 = 77,591.24/x
  3. Step 3: Cross multiply
    172,428.18x = 258,639.24 × 77,591.24
  4. Step 4: Simplify right side
    172,428.18x = 20,068,139,311.93
  5. Step 5: Solve for x
    x = 20,068,139,311.93/172,428.18
  6. Step 6: Final answer
    x = 116,385.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.