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Finding the Fourth Proportional to 124,909.89, 172,369.30 and 77,167.41

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Solution

The fourth proportional to 124,909.89, 172,369.30 and 77,167.41 is: 106,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,909.89 : 172,369.30 = 77,167.41 : x
  2. Step 2: Convert to fraction form
    124,909.89/172,369.30 = 77,167.41/x
  3. Step 3: Cross multiply
    124,909.89x = 172,369.30 × 77,167.41
  4. Step 4: Simplify right side
    124,909.89x = 13,301,292,444.51
  5. Step 5: Solve for x
    x = 13,301,292,444.51/124,909.89
  6. Step 6: Final answer
    x = 106,487.10

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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.