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Finding the Fourth Proportional to 100,559.60, 150,839.40 and 61,128.80

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Solution

The fourth proportional to 100,559.60, 150,839.40 and 61,128.80 is: 91,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,559.60 : 150,839.40 = 61,128.80 : x
  2. Step 2: Convert to fraction form
    100,559.60/150,839.40 = 61,128.80/x
  3. Step 3: Cross multiply
    100,559.60x = 150,839.40 × 61,128.80
  4. Step 4: Simplify right side
    100,559.60x = 9,220,631,514.72
  5. Step 5: Solve for x
    x = 9,220,631,514.72/100,559.60
  6. Step 6: Final answer
    x = 91,693.20

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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.