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Finding the Fourth Proportional to 65,987.52, 98,960.45 and 21,604.07

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Solution

The fourth proportional to 65,987.52, 98,960.45 and 21,604.07 is: 32,399.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,987.52 : 98,960.45 = 21,604.07 : x
  2. Step 2: Convert to fraction form
    65,987.52/98,960.45 = 21,604.07/x
  3. Step 3: Cross multiply
    65,987.52x = 98,960.45 × 21,604.07
  4. Step 4: Simplify right side
    65,987.52x = 2,137,947,886.21
  5. Step 5: Solve for x
    x = 2,137,947,886.21/65,987.52
  6. Step 6: Final answer
    x = 32,399.28

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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.