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Finding the Fourth Proportional to 153,843.17, 212,303.78 and 85,860.14

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Solution

The fourth proportional to 153,843.17, 212,303.78 and 85,860.14 is: 118,487.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,843.17 : 212,303.78 = 85,860.14 : x
  2. Step 2: Convert to fraction form
    153,843.17/212,303.78 = 85,860.14/x
  3. Step 3: Cross multiply
    153,843.17x = 212,303.78 × 85,860.14
  4. Step 4: Simplify right side
    153,843.17x = 18,228,432,374.79
  5. Step 5: Solve for x
    x = 18,228,432,374.79/153,843.17
  6. Step 6: Final answer
    x = 118,487.11

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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.