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Finding the Fourth Proportional to 91,808.28, 137,770.68 and 39,218.16

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Solution

The fourth proportional to 91,808.28, 137,770.68 and 39,218.16 is: 58,852.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,808.28 : 137,770.68 = 39,218.16 : x
  2. Step 2: Convert to fraction form
    91,808.28/137,770.68 = 39,218.16/x
  3. Step 3: Cross multiply
    91,808.28x = 137,770.68 × 39,218.16
  4. Step 4: Simplify right side
    91,808.28x = 5,403,112,571.55
  5. Step 5: Solve for x
    x = 5,403,112,571.55/91,808.28
  6. Step 6: Final answer
    x = 58,852.13

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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.