Home / 85,970.18-129,048.65-72,704.91

Finding the Fourth Proportional to 85,970.18, 129,048.65 and 72,704.91

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Solution

The fourth proportional to 85,970.18, 129,048.65 and 72,704.91 is: 109,136.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,970.18 : 129,048.65 = 72,704.91 : x
  2. Step 2: Convert to fraction form
    85,970.18/129,048.65 = 72,704.91/x
  3. Step 3: Cross multiply
    85,970.18x = 129,048.65 × 72,704.91
  4. Step 4: Simplify right side
    85,970.18x = 9,382,471,387.33
  5. Step 5: Solve for x
    x = 9,382,471,387.33/85,970.18
  6. Step 6: Final answer
    x = 109,136.35

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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.