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Finding the Fourth Proportional to 64,154.80, 96,234.40 and 19,781.20

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Solution

The fourth proportional to 64,154.80, 96,234.40 and 19,781.20 is: 29,672.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,154.80 : 96,234.40 = 19,781.20 : x
  2. Step 2: Convert to fraction form
    64,154.80/96,234.40 = 19,781.20/x
  3. Step 3: Cross multiply
    64,154.80x = 96,234.40 × 19,781.20
  4. Step 4: Simplify right side
    64,154.80x = 1,903,631,913.28
  5. Step 5: Solve for x
    x = 1,903,631,913.28/64,154.80
  6. Step 6: Final answer
    x = 29,672.48

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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.