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Finding the Fourth Proportional to 68,845.80, 103,487.40 and 64,909.20

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Solution

The fourth proportional to 68,845.80, 103,487.40 and 64,909.20 is: 97,569.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,845.80 : 103,487.40 = 64,909.20 : x
  2. Step 2: Convert to fraction form
    68,845.80/103,487.40 = 64,909.20/x
  3. Step 3: Cross multiply
    68,845.80x = 103,487.40 × 64,909.20
  4. Step 4: Simplify right side
    68,845.80x = 6,717,284,344.08
  5. Step 5: Solve for x
    x = 6,717,284,344.08/68,845.80
  6. Step 6: Final answer
    x = 97,569.99

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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.