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Finding the Fourth Proportional to 111,140.64, 153,300.24 and 79,327.44

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Solution

The fourth proportional to 111,140.64, 153,300.24 and 79,327.44 is: 109,419.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,140.64 : 153,300.24 = 79,327.44 : x
  2. Step 2: Convert to fraction form
    111,140.64/153,300.24 = 79,327.44/x
  3. Step 3: Cross multiply
    111,140.64x = 153,300.24 × 79,327.44
  4. Step 4: Simplify right side
    111,140.64x = 12,160,915,590.59
  5. Step 5: Solve for x
    x = 12,160,915,590.59/111,140.64
  6. Step 6: Final answer
    x = 109,419.16

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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.