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Finding the Fourth Proportional to 65,718.72, 98,591.68 and 21,346.40

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Solution

The fourth proportional to 65,718.72, 98,591.68 and 21,346.40 is: 32,024.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,718.72 : 98,591.68 = 21,346.40 : x
  2. Step 2: Convert to fraction form
    65,718.72/98,591.68 = 21,346.40/x
  3. Step 3: Cross multiply
    65,718.72x = 98,591.68 × 21,346.40
  4. Step 4: Simplify right side
    65,718.72x = 2,104,577,437.95
  5. Step 5: Solve for x
    x = 2,104,577,437.95/65,718.72
  6. Step 6: Final answer
    x = 32,024.02

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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.