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Finding the Fourth Proportional to 170,358.31, 255,695.69 and 86,177.98

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Solution

The fourth proportional to 170,358.31, 255,695.69 and 86,177.98 is: 129,347.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,358.31 : 255,695.69 = 86,177.98 : x
  2. Step 2: Convert to fraction form
    170,358.31/255,695.69 = 86,177.98/x
  3. Step 3: Cross multiply
    170,358.31x = 255,695.69 × 86,177.98
  4. Step 4: Simplify right side
    170,358.31x = 22,035,338,058.91
  5. Step 5: Solve for x
    x = 22,035,338,058.91/170,358.31
  6. Step 6: Final answer
    x = 129,347.01

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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.