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Finding the Fourth Proportional to 125,252.28, 172,865.94 and 77,521

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Solution

The fourth proportional to 125,252.28, 172,865.94 and 77,521 is: 106,989.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,252.28 : 172,865.94 = 77,521 : x
  2. Step 2: Convert to fraction form
    125,252.28/172,865.94 = 77,521/x
  3. Step 3: Cross multiply
    125,252.28x = 172,865.94 × 77,521
  4. Step 4: Simplify right side
    125,252.28x = 13,400,740,534.74
  5. Step 5: Solve for x
    x = 13,400,740,534.74/125,252.28
  6. Step 6: Final answer
    x = 106,989.99

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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.