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Finding the Fourth Proportional to 84,672.30, 127,008.45 and 42,681.90

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Solution

The fourth proportional to 84,672.30, 127,008.45 and 42,681.90 is: 64,022.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,672.30 : 127,008.45 = 42,681.90 : x
  2. Step 2: Convert to fraction form
    84,672.30/127,008.45 = 42,681.90/x
  3. Step 3: Cross multiply
    84,672.30x = 127,008.45 × 42,681.90
  4. Step 4: Simplify right side
    84,672.30x = 5,420,961,962.06
  5. Step 5: Solve for x
    x = 5,420,961,962.06/84,672.30
  6. Step 6: Final answer
    x = 64,022.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.