Home / 205,280.10-307,856.15-80,659.30

Finding the Fourth Proportional to 205,280.10, 307,856.15 and 80,659.30

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Solution

The fourth proportional to 205,280.10, 307,856.15 and 80,659.30 is: 120,963.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,280.10 : 307,856.15 = 80,659.30 : x
  2. Step 2: Convert to fraction form
    205,280.10/307,856.15 = 80,659.30/x
  3. Step 3: Cross multiply
    205,280.10x = 307,856.15 × 80,659.30
  4. Step 4: Simplify right side
    205,280.10x = 24,831,461,559.70
  5. Step 5: Solve for x
    x = 24,831,461,559.70/205,280.10
  6. Step 6: Final answer
    x = 120,963.80

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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.