Home / 128,299.17-177,058.26-71,710.50

Finding the Fourth Proportional to 128,299.17, 177,058.26 and 71,710.50

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Solution

The fourth proportional to 128,299.17, 177,058.26 and 71,710.50 is: 98,963.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,299.17 : 177,058.26 = 71,710.50 : x
  2. Step 2: Convert to fraction form
    128,299.17/177,058.26 = 71,710.50/x
  3. Step 3: Cross multiply
    128,299.17x = 177,058.26 × 71,710.50
  4. Step 4: Simplify right side
    128,299.17x = 12,696,936,353.73
  5. Step 5: Solve for x
    x = 12,696,936,353.73/128,299.17
  6. Step 6: Final answer
    x = 98,963.51

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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.