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Finding the Fourth Proportional to 91,907.70, 137,861.55 and 25,358.10

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Solution

The fourth proportional to 91,907.70, 137,861.55 and 25,358.10 is: 38,037.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,907.70 : 137,861.55 = 25,358.10 : x
  2. Step 2: Convert to fraction form
    91,907.70/137,861.55 = 25,358.10/x
  3. Step 3: Cross multiply
    91,907.70x = 137,861.55 × 25,358.10
  4. Step 4: Simplify right side
    91,907.70x = 3,495,906,971.06
  5. Step 5: Solve for x
    x = 3,495,906,971.06/91,907.70
  6. Step 6: Final answer
    x = 38,037.15

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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.