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Finding the Fourth Proportional to 154,017.34, 212,543.03 and 86,034.11

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Solution

The fourth proportional to 154,017.34, 212,543.03 and 86,034.11 is: 118,726.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,017.34 : 212,543.03 = 86,034.11 : x
  2. Step 2: Convert to fraction form
    154,017.34/212,543.03 = 86,034.11/x
  3. Step 3: Cross multiply
    154,017.34x = 212,543.03 × 86,034.11
  4. Step 4: Simplify right side
    154,017.34x = 18,285,948,929.87
  5. Step 5: Solve for x
    x = 18,285,948,929.87/154,017.34
  6. Step 6: Final answer
    x = 118,726.56

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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.