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Finding the Fourth Proportional to 111,644.32, 153,909.84 and 79,801.60

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Solution

The fourth proportional to 111,644.32, 153,909.84 and 79,801.60 is: 110,012.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,644.32 : 153,909.84 = 79,801.60 : x
  2. Step 2: Convert to fraction form
    111,644.32/153,909.84 = 79,801.60/x
  3. Step 3: Cross multiply
    111,644.32x = 153,909.84 × 79,801.60
  4. Step 4: Simplify right side
    111,644.32x = 12,282,251,487.74
  5. Step 5: Solve for x
    x = 12,282,251,487.74/111,644.32
  6. Step 6: Final answer
    x = 110,012.33

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1.5x scale

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.