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Finding the Fourth Proportional to 138,152.80, 207,338.55 and 53,953.30

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Solution

The fourth proportional to 138,152.80, 207,338.55 and 53,953.30 is: 80,972.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,152.80 : 207,338.55 = 53,953.30 : x
  2. Step 2: Convert to fraction form
    138,152.80/207,338.55 = 53,953.30/x
  3. Step 3: Cross multiply
    138,152.80x = 207,338.55 × 53,953.30
  4. Step 4: Simplify right side
    138,152.80x = 11,186,598,989.72
  5. Step 5: Solve for x
    x = 11,186,598,989.72/138,152.80
  6. Step 6: Final answer
    x = 80,972.65

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1.5x scale

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.