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Finding the Fourth Proportional to 187,218.60, 280,829.10 and 74,908.20

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Solution

The fourth proportional to 187,218.60, 280,829.10 and 74,908.20 is: 112,362.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,218.60 : 280,829.10 = 74,908.20 : x
  2. Step 2: Convert to fraction form
    187,218.60/280,829.10 = 74,908.20/x
  3. Step 3: Cross multiply
    187,218.60x = 280,829.10 × 74,908.20
  4. Step 4: Simplify right side
    187,218.60x = 21,036,402,388.62
  5. Step 5: Solve for x
    x = 21,036,402,388.62/187,218.60
  6. Step 6: Final answer
    x = 112,362.78

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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.