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Finding the Fourth Proportional to 138,125.76, 207,157.92 and 53,888.16

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Solution

The fourth proportional to 138,125.76, 207,157.92 and 53,888.16 is: 80,820.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,125.76 : 207,157.92 = 53,888.16 : x
  2. Step 2: Convert to fraction form
    138,125.76/207,157.92 = 53,888.16/x
  3. Step 3: Cross multiply
    138,125.76x = 207,157.92 × 53,888.16
  4. Step 4: Simplify right side
    138,125.76x = 11,163,359,138.23
  5. Step 5: Solve for x
    x = 11,163,359,138.23/138,125.76
  6. Step 6: Final answer
    x = 80,820.25

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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.