Home / 66,472.20-99,708.30-31,480.20

Finding the Fourth Proportional to 66,472.20, 99,708.30 and 31,480.20

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Solution

The fourth proportional to 66,472.20, 99,708.30 and 31,480.20 is: 47,220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,472.20 : 99,708.30 = 31,480.20 : x
  2. Step 2: Convert to fraction form
    66,472.20/99,708.30 = 31,480.20/x
  3. Step 3: Cross multiply
    66,472.20x = 99,708.30 × 31,480.20
  4. Step 4: Simplify right side
    66,472.20x = 3,138,837,225.66
  5. Step 5: Solve for x
    x = 3,138,837,225.66/66,472.20
  6. Step 6: Final answer
    x = 47,220.30

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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.