Home / 72,130.43-99,538.17-40,299.56

Finding the Fourth Proportional to 72,130.43, 99,538.17 and 40,299.56

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Solution

The fourth proportional to 72,130.43, 99,538.17 and 40,299.56 is: 55,612.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,130.43 : 99,538.17 = 40,299.56 : x
  2. Step 2: Convert to fraction form
    72,130.43/99,538.17 = 40,299.56/x
  3. Step 3: Cross multiply
    72,130.43x = 99,538.17 × 40,299.56
  4. Step 4: Simplify right side
    72,130.43x = 4,011,344,454.21
  5. Step 5: Solve for x
    x = 4,011,344,454.21/72,130.43
  6. Step 6: Final answer
    x = 55,612.37

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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.