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Finding the Fourth Proportional to 138,740.60, 207,650.10 and 97,268.60

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Solution

The fourth proportional to 138,740.60, 207,650.10 and 97,268.60 is: 145,579.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,740.60 : 207,650.10 = 97,268.60 : x
  2. Step 2: Convert to fraction form
    138,740.60/207,650.10 = 97,268.60/x
  3. Step 3: Cross multiply
    138,740.60x = 207,650.10 × 97,268.60
  4. Step 4: Simplify right side
    138,740.60x = 20,197,834,516.86
  5. Step 5: Solve for x
    x = 20,197,834,516.86/138,740.60
  6. Step 6: Final answer
    x = 145,579.84

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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.