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Finding the Fourth Proportional to 119,978.31, 165,560.40 and 68,988.45

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Solution

The fourth proportional to 119,978.31, 165,560.40 and 68,988.45 is: 95,198.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,978.31 : 165,560.40 = 68,988.45 : x
  2. Step 2: Convert to fraction form
    119,978.31/165,560.40 = 68,988.45/x
  3. Step 3: Cross multiply
    119,978.31x = 165,560.40 × 68,988.45
  4. Step 4: Simplify right side
    119,978.31x = 11,421,755,377.38
  5. Step 5: Solve for x
    x = 11,421,755,377.38/119,978.31
  6. Step 6: Final answer
    x = 95,198.50

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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.