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Finding the Fourth Proportional to 91,360.10, 137,040.15 and 87,860.90

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Solution

The fourth proportional to 91,360.10, 137,040.15 and 87,860.90 is: 131,791.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,360.10 : 137,040.15 = 87,860.90 : x
  2. Step 2: Convert to fraction form
    91,360.10/137,040.15 = 87,860.90/x
  3. Step 3: Cross multiply
    91,360.10x = 137,040.15 × 87,860.90
  4. Step 4: Simplify right side
    91,360.10x = 12,040,470,915.14
  5. Step 5: Solve for x
    x = 12,040,470,915.14/91,360.10
  6. Step 6: Final answer
    x = 131,791.35

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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.