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Finding the Fourth Proportional to 68,493.79, 102,740.55 and 25,807.20

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Solution

The fourth proportional to 68,493.79, 102,740.55 and 25,807.20 is: 38,710.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,493.79 : 102,740.55 = 25,807.20 : x
  2. Step 2: Convert to fraction form
    68,493.79/102,740.55 = 25,807.20/x
  3. Step 3: Cross multiply
    68,493.79x = 102,740.55 × 25,807.20
  4. Step 4: Simplify right side
    68,493.79x = 2,651,445,921.96
  5. Step 5: Solve for x
    x = 2,651,445,921.96/68,493.79
  6. Step 6: Final answer
    x = 38,710.75

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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.