Home / 91,132.80-136,718.40-38,515.20

Finding the Fourth Proportional to 91,132.80, 136,718.40 and 38,515.20

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Solution

The fourth proportional to 91,132.80, 136,718.40 and 38,515.20 is: 57,780.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,132.80 : 136,718.40 = 38,515.20 : x
  2. Step 2: Convert to fraction form
    91,132.80/136,718.40 = 38,515.20/x
  3. Step 3: Cross multiply
    91,132.80x = 136,718.40 × 38,515.20
  4. Step 4: Simplify right side
    91,132.80x = 5,265,736,519.68
  5. Step 5: Solve for x
    x = 5,265,736,519.68/91,132.80
  6. Step 6: Final answer
    x = 57,780.91

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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.