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Finding the Fourth Proportional to 63,128.40, 94,769.40 and 47,422.80

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Solution

The fourth proportional to 63,128.40, 94,769.40 and 47,422.80 is: 71,191.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,128.40 : 94,769.40 = 47,422.80 : x
  2. Step 2: Convert to fraction form
    63,128.40/94,769.40 = 47,422.80/x
  3. Step 3: Cross multiply
    63,128.40x = 94,769.40 × 47,422.80
  4. Step 4: Simplify right side
    63,128.40x = 4,494,230,302.32
  5. Step 5: Solve for x
    x = 4,494,230,302.32/63,128.40
  6. Step 6: Final answer
    x = 71,191.89

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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.