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Finding the Fourth Proportional to 128,040.71, 176,696.33 and 71,452.07

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Solution

The fourth proportional to 128,040.71, 176,696.33 and 71,452.07 is: 98,603.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,040.71 : 176,696.33 = 71,452.07 : x
  2. Step 2: Convert to fraction form
    128,040.71/176,696.33 = 71,452.07/x
  3. Step 3: Cross multiply
    128,040.71x = 176,696.33 × 71,452.07
  4. Step 4: Simplify right side
    128,040.71x = 12,625,318,182.64
  5. Step 5: Solve for x
    x = 12,625,318,182.64/128,040.71
  6. Step 6: Final answer
    x = 98,603.94

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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.