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Finding the Fourth Proportional to 42,687.72, 64,014.48 and 17,710.80

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Solution

The fourth proportional to 42,687.72, 64,014.48 and 17,710.80 is: 26,559.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,687.72 : 64,014.48 = 17,710.80 : x
  2. Step 2: Convert to fraction form
    42,687.72/64,014.48 = 17,710.80/x
  3. Step 3: Cross multiply
    42,687.72x = 64,014.48 × 17,710.80
  4. Step 4: Simplify right side
    42,687.72x = 1,133,747,652.38
  5. Step 5: Solve for x
    x = 1,133,747,652.38/42,687.72
  6. Step 6: Final answer
    x = 26,559.11

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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.