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Finding the Fourth Proportional to 153,809.66, 212,251.10 and 89,280.20

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Solution

The fourth proportional to 153,809.66, 212,251.10 and 89,280.20 is: 123,203.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,809.66 : 212,251.10 = 89,280.20 : x
  2. Step 2: Convert to fraction form
    153,809.66/212,251.10 = 89,280.20/x
  3. Step 3: Cross multiply
    153,809.66x = 212,251.10 × 89,280.20
  4. Step 4: Simplify right side
    153,809.66x = 18,949,820,658.22
  5. Step 5: Solve for x
    x = 18,949,820,658.22/153,809.66
  6. Step 6: Final answer
    x = 123,203.06

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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.