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Finding the Fourth Proportional to 111,218.28, 153,494.10 and 63,478.50

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Solution

The fourth proportional to 111,218.28, 153,494.10 and 63,478.50 is: 87,607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,218.28 : 153,494.10 = 63,478.50 : x
  2. Step 2: Convert to fraction form
    111,218.28/153,494.10 = 63,478.50/x
  3. Step 3: Cross multiply
    111,218.28x = 153,494.10 × 63,478.50
  4. Step 4: Simplify right side
    111,218.28x = 9,743,575,226.85
  5. Step 5: Solve for x
    x = 9,743,575,226.85/111,218.28
  6. Step 6: Final answer
    x = 87,607.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.