Home / 40,200.30-55,412.46-31,688.61

Finding the Fourth Proportional to 40,200.30, 55,412.46 and 31,688.61

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Solution

The fourth proportional to 40,200.30, 55,412.46 and 31,688.61 is: 43,679.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,200.30 : 55,412.46 = 31,688.61 : x
  2. Step 2: Convert to fraction form
    40,200.30/55,412.46 = 31,688.61/x
  3. Step 3: Cross multiply
    40,200.30x = 55,412.46 × 31,688.61
  4. Step 4: Simplify right side
    40,200.30x = 1,755,943,834.08
  5. Step 5: Solve for x
    x = 1,755,943,834.08/40,200.30
  6. Step 6: Final answer
    x = 43,679.87

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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.