Home / 115,387.12-159,209.51-86,737.42

Finding the Fourth Proportional to 115,387.12, 159,209.51 and 86,737.42

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Solution

The fourth proportional to 115,387.12, 159,209.51 and 86,737.42 is: 119,679.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,387.12 : 159,209.51 = 86,737.42 : x
  2. Step 2: Convert to fraction form
    115,387.12/159,209.51 = 86,737.42/x
  3. Step 3: Cross multiply
    115,387.12x = 159,209.51 × 86,737.42
  4. Step 4: Simplify right side
    115,387.12x = 13,809,422,136.86
  5. Step 5: Solve for x
    x = 13,809,422,136.86/115,387.12
  6. Step 6: Final answer
    x = 119,679.06

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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.