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Finding the Fourth Proportional to 91,937.70, 137,906.55 and 35,780.40

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Solution

The fourth proportional to 91,937.70, 137,906.55 and 35,780.40 is: 53,670.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,937.70 : 137,906.55 = 35,780.40 : x
  2. Step 2: Convert to fraction form
    91,937.70/137,906.55 = 35,780.40/x
  3. Step 3: Cross multiply
    91,937.70x = 137,906.55 × 35,780.40
  4. Step 4: Simplify right side
    91,937.70x = 4,934,351,521.62
  5. Step 5: Solve for x
    x = 4,934,351,521.62/91,937.70
  6. Step 6: Final answer
    x = 53,670.60

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1.5x scale

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.