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Finding the Fourth Proportional to 42,750.65, 64,070.06 and 22,986.65

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Solution

The fourth proportional to 42,750.65, 64,070.06 and 22,986.65 is: 34,449.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,750.65 : 64,070.06 = 22,986.65 : x
  2. Step 2: Convert to fraction form
    42,750.65/64,070.06 = 22,986.65/x
  3. Step 3: Cross multiply
    42,750.65x = 64,070.06 × 22,986.65
  4. Step 4: Simplify right side
    42,750.65x = 1,472,755,609.42
  5. Step 5: Solve for x
    x = 1,472,755,609.42/42,750.65
  6. Step 6: Final answer
    x = 34,449.90

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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.