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Finding the Fourth Proportional to 159,825.80, 239,316.30 and 128,088.20

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Solution

The fourth proportional to 159,825.80, 239,316.30 and 128,088.20 is: 191,793.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,825.80 : 239,316.30 = 128,088.20 : x
  2. Step 2: Convert to fraction form
    159,825.80/239,316.30 = 128,088.20/x
  3. Step 3: Cross multiply
    159,825.80x = 239,316.30 × 128,088.20
  4. Step 4: Simplify right side
    159,825.80x = 30,653,594,097.66
  5. Step 5: Solve for x
    x = 30,653,594,097.66/159,825.80
  6. Step 6: Final answer
    x = 191,793.78

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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.