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Finding the Fourth Proportional to 65,772.80, 98,666.40 and 63,699.20

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Solution

The fourth proportional to 65,772.80, 98,666.40 and 63,699.20 is: 95,555.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,772.80 : 98,666.40 = 63,699.20 : x
  2. Step 2: Convert to fraction form
    65,772.80/98,666.40 = 63,699.20/x
  3. Step 3: Cross multiply
    65,772.80x = 98,666.40 × 63,699.20
  4. Step 4: Simplify right side
    65,772.80x = 6,284,970,746.88
  5. Step 5: Solve for x
    x = 6,284,970,746.88/65,772.80
  6. Step 6: Final answer
    x = 95,555.77

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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.