Home / 80,557.20-120,720.60-55,904.40

Finding the Fourth Proportional to 80,557.20, 120,720.60 and 55,904.40

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Solution

The fourth proportional to 80,557.20, 120,720.60 and 55,904.40 is: 83,776.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,557.20 : 120,720.60 = 55,904.40 : x
  2. Step 2: Convert to fraction form
    80,557.20/120,720.60 = 55,904.40/x
  3. Step 3: Cross multiply
    80,557.20x = 120,720.60 × 55,904.40
  4. Step 4: Simplify right side
    80,557.20x = 6,748,812,710.64
  5. Step 5: Solve for x
    x = 6,748,812,710.64/80,557.20
  6. Step 6: Final answer
    x = 83,776.65

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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.