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Finding the Fourth Proportional to 83,346.98, 115,008.72 and 66,394.40

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Solution

The fourth proportional to 83,346.98, 115,008.72 and 66,394.40 is: 91,616.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,346.98 : 115,008.72 = 66,394.40 : x
  2. Step 2: Convert to fraction form
    83,346.98/115,008.72 = 66,394.40/x
  3. Step 3: Cross multiply
    83,346.98x = 115,008.72 × 66,394.40
  4. Step 4: Simplify right side
    83,346.98x = 7,635,934,959.17
  5. Step 5: Solve for x
    x = 7,635,934,959.17/83,346.98
  6. Step 6: Final answer
    x = 91,616.22

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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.