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Finding the Fourth Proportional to 91,472.40, 137,208.60 and 63,478.80

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Solution

The fourth proportional to 91,472.40, 137,208.60 and 63,478.80 is: 95,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,472.40 : 137,208.60 = 63,478.80 : x
  2. Step 2: Convert to fraction form
    91,472.40/137,208.60 = 63,478.80/x
  3. Step 3: Cross multiply
    91,472.40x = 137,208.60 × 63,478.80
  4. Step 4: Simplify right side
    91,472.40x = 8,709,837,277.68
  5. Step 5: Solve for x
    x = 8,709,837,277.68/91,472.40
  6. Step 6: Final answer
    x = 95,218.20

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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.