Home / 128,034.20-176,669.54-71,434.60

Finding the Fourth Proportional to 128,034.20, 176,669.54 and 71,434.60

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Solution

The fourth proportional to 128,034.20, 176,669.54 and 71,434.60 is: 98,569.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,034.20 : 176,669.54 = 71,434.60 : x
  2. Step 2: Convert to fraction form
    128,034.20/176,669.54 = 71,434.60/x
  3. Step 3: Cross multiply
    128,034.20x = 176,669.54 × 71,434.60
  4. Step 4: Simplify right side
    128,034.20x = 12,620,317,922.08
  5. Step 5: Solve for x
    x = 12,620,317,922.08/128,034.20
  6. Step 6: Final answer
    x = 98,569.90

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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.