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Finding the Fourth Proportional to 91,940.60, 137,812.80 and 52,412.60

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Solution

The fourth proportional to 91,940.60, 137,812.80 and 52,412.60 is: 78,562.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,940.60 : 137,812.80 = 52,412.60 : x
  2. Step 2: Convert to fraction form
    91,940.60/137,812.80 = 52,412.60/x
  3. Step 3: Cross multiply
    91,940.60x = 137,812.80 × 52,412.60
  4. Step 4: Simplify right side
    91,940.60x = 7,223,127,161.28
  5. Step 5: Solve for x
    x = 7,223,127,161.28/91,940.60
  6. Step 6: Final answer
    x = 78,562.98

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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.