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Finding the Fourth Proportional to 153,398.43, 211,639.10 and 89,691.12

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Solution

The fourth proportional to 153,398.43, 211,639.10 and 89,691.12 is: 123,744.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,398.43 : 211,639.10 = 89,691.12 : x
  2. Step 2: Convert to fraction form
    153,398.43/211,639.10 = 89,691.12/x
  3. Step 3: Cross multiply
    153,398.43x = 211,639.10 × 89,691.12
  4. Step 4: Simplify right side
    153,398.43x = 18,982,147,466.34
  5. Step 5: Solve for x
    x = 18,982,147,466.34/153,398.43
  6. Step 6: Final answer
    x = 123,744.08

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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.