Home / 72,146.74-99,560.59-40,315.90

Finding the Fourth Proportional to 72,146.74, 99,560.59 and 40,315.90

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Solution

The fourth proportional to 72,146.74, 99,560.59 and 40,315.90 is: 55,634.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,146.74 : 99,560.59 = 40,315.90 : x
  2. Step 2: Convert to fraction form
    72,146.74/99,560.59 = 40,315.90/x
  3. Step 3: Cross multiply
    72,146.74x = 99,560.59 × 40,315.90
  4. Step 4: Simplify right side
    72,146.74x = 4,013,874,790.38
  5. Step 5: Solve for x
    x = 4,013,874,790.38/72,146.74
  6. Step 6: Final answer
    x = 55,634.87

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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.