Home / 129,157.03-178,251.12-78,197.83

Finding the Fourth Proportional to 129,157.03, 178,251.12 and 78,197.83

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Solution

The fourth proportional to 129,157.03, 178,251.12 and 78,197.83 is: 107,921.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,157.03 : 178,251.12 = 78,197.83 : x
  2. Step 2: Convert to fraction form
    129,157.03/178,251.12 = 78,197.83/x
  3. Step 3: Cross multiply
    129,157.03x = 178,251.12 × 78,197.83
  4. Step 4: Simplify right side
    129,157.03x = 13,938,850,779.07
  5. Step 5: Solve for x
    x = 13,938,850,779.07/129,157.03
  6. Step 6: Final answer
    x = 107,921.74

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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.