Home / 128,248.11-176,981.94-71,659.49

Finding the Fourth Proportional to 128,248.11, 176,981.94 and 71,659.49

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Solution

The fourth proportional to 128,248.11, 176,981.94 and 71,659.49 is: 98,889.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,248.11 : 176,981.94 = 71,659.49 : x
  2. Step 2: Convert to fraction form
    128,248.11/176,981.94 = 71,659.49/x
  3. Step 3: Cross multiply
    128,248.11x = 176,981.94 × 71,659.49
  4. Step 4: Simplify right side
    128,248.11x = 12,682,434,674.70
  5. Step 5: Solve for x
    x = 12,682,434,674.70/128,248.11
  6. Step 6: Final answer
    x = 98,889.84

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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.