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Finding the Fourth Proportional to 125,666, 173,419.08 and 71,968.78

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Solution

The fourth proportional to 125,666, 173,419.08 and 71,968.78 is: 99,316.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,666 : 173,419.08 = 71,968.78 : x
  2. Step 2: Convert to fraction form
    125,666/173,419.08 = 71,968.78/x
  3. Step 3: Cross multiply
    125,666x = 173,419.08 × 71,968.78
  4. Step 4: Simplify right side
    125,666x = 12,480,759,616.32
  5. Step 5: Solve for x
    x = 12,480,759,616.32/125,666
  6. Step 6: Final answer
    x = 99,316.92

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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.