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Finding the Fourth Proportional to 128,437.92, 177,244.83 and 71,849.34

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Solution

The fourth proportional to 128,437.92, 177,244.83 and 71,849.34 is: 99,152.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,437.92 : 177,244.83 = 71,849.34 : x
  2. Step 2: Convert to fraction form
    128,437.92/177,244.83 = 71,849.34/x
  3. Step 3: Cross multiply
    128,437.92x = 177,244.83 × 71,849.34
  4. Step 4: Simplify right side
    128,437.92x = 12,734,924,053.91
  5. Step 5: Solve for x
    x = 12,734,924,053.91/128,437.92
  6. Step 6: Final answer
    x = 99,152.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.