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Finding the Fourth Proportional to 125,712, 173,487.42 and 69,122.16

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Solution

The fourth proportional to 125,712, 173,487.42 and 69,122.16 is: 95,391.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,712 : 173,487.42 = 69,122.16 : x
  2. Step 2: Convert to fraction form
    125,712/173,487.42 = 69,122.16/x
  3. Step 3: Cross multiply
    125,712x = 173,487.42 × 69,122.16
  4. Step 4: Simplify right side
    125,712x = 11,991,825,203.23
  5. Step 5: Solve for x
    x = 11,991,825,203.23/125,712
  6. Step 6: Final answer
    x = 95,391.25

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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.