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Finding the Fourth Proportional to 54,931, 82,347.63 and 19,862.86

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Solution

The fourth proportional to 54,931, 82,347.63 and 19,862.86 is: 29,776.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,931 : 82,347.63 = 19,862.86 : x
  2. Step 2: Convert to fraction form
    54,931/82,347.63 = 19,862.86/x
  3. Step 3: Cross multiply
    54,931x = 82,347.63 × 19,862.86
  4. Step 4: Simplify right side
    54,931x = 1,635,659,446.02
  5. Step 5: Solve for x
    x = 1,635,659,446.02/54,931
  6. Step 6: Final answer
    x = 29,776.62

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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.