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Finding the Fourth Proportional to 85,737.98, 128,689.80 and 41,395.88

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Solution

The fourth proportional to 85,737.98, 128,689.80 and 41,395.88 is: 62,133.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,737.98 : 128,689.80 = 41,395.88 : x
  2. Step 2: Convert to fraction form
    85,737.98/128,689.80 = 41,395.88/x
  3. Step 3: Cross multiply
    85,737.98x = 128,689.80 × 41,395.88
  4. Step 4: Simplify right side
    85,737.98x = 5,327,227,518.02
  5. Step 5: Solve for x
    x = 5,327,227,518.02/85,737.98
  6. Step 6: Final answer
    x = 62,133.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.