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Finding the Fourth Proportional to 91,608.40, 137,489.40 and 44,901.20

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Solution

The fourth proportional to 91,608.40, 137,489.40 and 44,901.20 is: 67,389.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,608.40 : 137,489.40 = 44,901.20 : x
  2. Step 2: Convert to fraction form
    91,608.40/137,489.40 = 44,901.20/x
  3. Step 3: Cross multiply
    91,608.40x = 137,489.40 × 44,901.20
  4. Step 4: Simplify right side
    91,608.40x = 6,173,439,047.28
  5. Step 5: Solve for x
    x = 6,173,439,047.28/91,608.40
  6. Step 6: Final answer
    x = 67,389.44

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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.