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Finding the Fourth Proportional to 91,641.64, 137,366.46 and 38,364.16

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Solution

The fourth proportional to 91,641.64, 137,366.46 and 38,364.16 is: 57,506.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,641.64 : 137,366.46 = 38,364.16 : x
  2. Step 2: Convert to fraction form
    91,641.64/137,366.46 = 38,364.16/x
  3. Step 3: Cross multiply
    91,641.64x = 137,366.46 × 38,364.16
  4. Step 4: Simplify right side
    91,641.64x = 5,269,948,850.07
  5. Step 5: Solve for x
    x = 5,269,948,850.07/91,641.64
  6. Step 6: Final answer
    x = 57,506.05

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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.