Home / 71,985.15-99,337.28-40,159.44

Finding the Fourth Proportional to 71,985.15, 99,337.28 and 40,159.44

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Solution

The fourth proportional to 71,985.15, 99,337.28 and 40,159.44 is: 55,418.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,985.15 : 99,337.28 = 40,159.44 : x
  2. Step 2: Convert to fraction form
    71,985.15/99,337.28 = 40,159.44/x
  3. Step 3: Cross multiply
    71,985.15x = 99,337.28 × 40,159.44
  4. Step 4: Simplify right side
    71,985.15x = 3,989,329,335.13
  5. Step 5: Solve for x
    x = 3,989,329,335.13/71,985.15
  6. Step 6: Final answer
    x = 55,418.78

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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.