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Finding the Fourth Proportional to 153,600.12, 211,969.13 and 85,621.41

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Solution

The fourth proportional to 153,600.12, 211,969.13 and 85,621.41 is: 118,158.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,600.12 : 211,969.13 = 85,621.41 : x
  2. Step 2: Convert to fraction form
    153,600.12/211,969.13 = 85,621.41/x
  3. Step 3: Cross multiply
    153,600.12x = 211,969.13 × 85,621.41
  4. Step 4: Simplify right side
    153,600.12x = 18,149,095,358.97
  5. Step 5: Solve for x
    x = 18,149,095,358.97/153,600.12
  6. Step 6: Final answer
    x = 118,158.08

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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.