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Finding the Fourth Proportional to 65,774.52, 98,672.08 and 21,390.87

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Solution

The fourth proportional to 65,774.52, 98,672.08 and 21,390.87 is: 32,089.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,774.52 : 98,672.08 = 21,390.87 : x
  2. Step 2: Convert to fraction form
    65,774.52/98,672.08 = 21,390.87/x
  3. Step 3: Cross multiply
    65,774.52x = 98,672.08 × 21,390.87
  4. Step 4: Simplify right side
    65,774.52x = 2,110,681,635.91
  5. Step 5: Solve for x
    x = 2,110,681,635.91/65,774.52
  6. Step 6: Final answer
    x = 32,089.65

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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.