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Finding the Fourth Proportional to 91,880.70, 137,812.95 and 25,314.90

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Solution

The fourth proportional to 91,880.70, 137,812.95 and 25,314.90 is: 37,970.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,880.70 : 137,812.95 = 25,314.90 : x
  2. Step 2: Convert to fraction form
    91,880.70/137,812.95 = 25,314.90/x
  3. Step 3: Cross multiply
    91,880.70x = 137,812.95 × 25,314.90
  4. Step 4: Simplify right side
    91,880.70x = 3,488,721,047.96
  5. Step 5: Solve for x
    x = 3,488,721,047.96/91,880.70
  6. Step 6: Final answer
    x = 37,970.12

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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.