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Finding the Fourth Proportional to 159,547.80, 239,321.70 and 137,386.20

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Solution

The fourth proportional to 159,547.80, 239,321.70 and 137,386.20 is: 206,079.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,547.80 : 239,321.70 = 137,386.20 : x
  2. Step 2: Convert to fraction form
    159,547.80/239,321.70 = 137,386.20/x
  3. Step 3: Cross multiply
    159,547.80x = 239,321.70 × 137,386.20
  4. Step 4: Simplify right side
    159,547.80x = 32,879,498,940.54
  5. Step 5: Solve for x
    x = 32,879,498,940.54/159,547.80
  6. Step 6: Final answer
    x = 206,079.30

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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.