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Finding the Fourth Proportional to 123,251.60, 170,088.05 and 77,949.11

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Solution

The fourth proportional to 123,251.60, 170,088.05 and 77,949.11 is: 107,570.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,251.60 : 170,088.05 = 77,949.11 : x
  2. Step 2: Convert to fraction form
    123,251.60/170,088.05 = 77,949.11/x
  3. Step 3: Cross multiply
    123,251.60x = 170,088.05 × 77,949.11
  4. Step 4: Simplify right side
    123,251.60x = 13,258,210,878.95
  5. Step 5: Solve for x
    x = 13,258,210,878.95/123,251.60
  6. Step 6: Final answer
    x = 107,570.30

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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.