Home / 128,110.74-176,801.01-71,522.10

Finding the Fourth Proportional to 128,110.74, 176,801.01 and 71,522.10

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Solution

The fourth proportional to 128,110.74, 176,801.01 and 71,522.10 is: 98,705.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,110.74 : 176,801.01 = 71,522.10 : x
  2. Step 2: Convert to fraction form
    128,110.74/176,801.01 = 71,522.10/x
  3. Step 3: Cross multiply
    128,110.74x = 176,801.01 × 71,522.10
  4. Step 4: Simplify right side
    128,110.74x = 12,645,179,517.32
  5. Step 5: Solve for x
    x = 12,645,179,517.32/128,110.74
  6. Step 6: Final answer
    x = 98,705.07

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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.