Home / 120,280.02-165,989.13-77,912.28

Finding the Fourth Proportional to 120,280.02, 165,989.13 and 77,912.28

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Solution

The fourth proportional to 120,280.02, 165,989.13 and 77,912.28 is: 107,520.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,280.02 : 165,989.13 = 77,912.28 : x
  2. Step 2: Convert to fraction form
    120,280.02/165,989.13 = 77,912.28/x
  3. Step 3: Cross multiply
    120,280.02x = 165,989.13 × 77,912.28
  4. Step 4: Simplify right side
    120,280.02x = 12,932,591,573.52
  5. Step 5: Solve for x
    x = 12,932,591,573.52/120,280.02
  6. Step 6: Final answer
    x = 107,520.70

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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.