Home / 72,020.80-99,395.30-39,761.20

Finding the Fourth Proportional to 72,020.80, 99,395.30 and 39,761.20

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Solution

The fourth proportional to 72,020.80, 99,395.30 and 39,761.20 is: 54,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,020.80 : 99,395.30 = 39,761.20 : x
  2. Step 2: Convert to fraction form
    72,020.80/99,395.30 = 39,761.20/x
  3. Step 3: Cross multiply
    72,020.80x = 99,395.30 × 39,761.20
  4. Step 4: Simplify right side
    72,020.80x = 3,952,076,626.01
  5. Step 5: Solve for x
    x = 3,952,076,626.01/72,020.80
  6. Step 6: Final answer
    x = 54,874.10

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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.