Home / 128,192.45-176,755.50-87,380.73

Finding the Fourth Proportional to 128,192.45, 176,755.50 and 87,380.73

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Solution

The fourth proportional to 128,192.45, 176,755.50 and 87,380.73 is: 120,483.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,192.45 : 176,755.50 = 87,380.73 : x
  2. Step 2: Convert to fraction form
    128,192.45/176,755.50 = 87,380.73/x
  3. Step 3: Cross multiply
    128,192.45x = 176,755.50 × 87,380.73
  4. Step 4: Simplify right side
    128,192.45x = 15,445,024,621.52
  5. Step 5: Solve for x
    x = 15,445,024,621.52/128,192.45
  6. Step 6: Final answer
    x = 120,483.11

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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.