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Finding the Fourth Proportional to 122,798.56, 183,886.80 and 75,909.28

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Solution

The fourth proportional to 122,798.56, 183,886.80 and 75,909.28 is: 113,671.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,798.56 : 183,886.80 = 75,909.28 : x
  2. Step 2: Convert to fraction form
    122,798.56/183,886.80 = 75,909.28/x
  3. Step 3: Cross multiply
    122,798.56x = 183,886.80 × 75,909.28
  4. Step 4: Simplify right side
    122,798.56x = 13,958,714,589.50
  5. Step 5: Solve for x
    x = 13,958,714,589.50/122,798.56
  6. Step 6: Final answer
    x = 113,671.65

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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.