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Finding the Fourth Proportional to 161,691.84, 223,143.84 and 90,069.12

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Solution

The fourth proportional to 161,691.84, 223,143.84 and 90,069.12 is: 124,300.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,691.84 : 223,143.84 = 90,069.12 : x
  2. Step 2: Convert to fraction form
    161,691.84/223,143.84 = 90,069.12/x
  3. Step 3: Cross multiply
    161,691.84x = 223,143.84 × 90,069.12
  4. Step 4: Simplify right side
    161,691.84x = 20,098,369,302.22
  5. Step 5: Solve for x
    x = 20,098,369,302.22/161,691.84
  6. Step 6: Final answer
    x = 124,300.46

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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.