Home / 128,281.54-176,842.29-89,921.56

Finding the Fourth Proportional to 128,281.54, 176,842.29 and 89,921.56

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Solution

The fourth proportional to 128,281.54, 176,842.29 and 89,921.56 is: 123,961.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,281.54 : 176,842.29 = 89,921.56 : x
  2. Step 2: Convert to fraction form
    128,281.54/176,842.29 = 89,921.56/x
  3. Step 3: Cross multiply
    128,281.54x = 176,842.29 × 89,921.56
  4. Step 4: Simplify right side
    128,281.54x = 15,901,934,590.77
  5. Step 5: Solve for x
    x = 15,901,934,590.77/128,281.54
  6. Step 6: Final answer
    x = 123,961.21

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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.