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Finding the Fourth Proportional to 153,331.68, 211,593 and 85,346.90

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Solution

The fourth proportional to 153,331.68, 211,593 and 85,346.90 is: 117,776.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,331.68 : 211,593 = 85,346.90 : x
  2. Step 2: Convert to fraction form
    153,331.68/211,593 = 85,346.90/x
  3. Step 3: Cross multiply
    153,331.68x = 211,593 × 85,346.90
  4. Step 4: Simplify right side
    153,331.68x = 18,058,806,611.70
  5. Step 5: Solve for x
    x = 18,058,806,611.70/153,331.68
  6. Step 6: Final answer
    x = 117,776.10

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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.