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Finding the Fourth Proportional to 72,699.04, 100,324.20 and 40,868.20

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Solution

The fourth proportional to 72,699.04, 100,324.20 and 40,868.20 is: 56,397.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,699.04 : 100,324.20 = 40,868.20 : x
  2. Step 2: Convert to fraction form
    72,699.04/100,324.20 = 40,868.20/x
  3. Step 3: Cross multiply
    72,699.04x = 100,324.20 × 40,868.20
  4. Step 4: Simplify right side
    72,699.04x = 4,100,069,470.44
  5. Step 5: Solve for x
    x = 4,100,069,470.44/72,699.04
  6. Step 6: Final answer
    x = 56,397.85

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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.