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Finding the Fourth Proportional to 91,901.60, 137,679.60 and 47,376.80

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Solution

The fourth proportional to 91,901.60, 137,679.60 and 47,376.80 is: 70,976.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,901.60 : 137,679.60 = 47,376.80 : x
  2. Step 2: Convert to fraction form
    91,901.60/137,679.60 = 47,376.80/x
  3. Step 3: Cross multiply
    91,901.60x = 137,679.60 × 47,376.80
  4. Step 4: Simplify right side
    91,901.60x = 6,522,818,873.28
  5. Step 5: Solve for x
    x = 6,522,818,873.28/91,901.60
  6. Step 6: Final answer
    x = 70,976.12

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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.