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Finding the Fourth Proportional to 80,560.40, 120,840.60 and 79,005.20

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Solution

The fourth proportional to 80,560.40, 120,840.60 and 79,005.20 is: 118,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,560.40 : 120,840.60 = 79,005.20 : x
  2. Step 2: Convert to fraction form
    80,560.40/120,840.60 = 79,005.20/x
  3. Step 3: Cross multiply
    80,560.40x = 120,840.60 × 79,005.20
  4. Step 4: Simplify right side
    80,560.40x = 9,547,035,771.12
  5. Step 5: Solve for x
    x = 9,547,035,771.12/80,560.40
  6. Step 6: Final answer
    x = 118,507.80

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1.5x scale

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.