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Finding the Fourth Proportional to 153,683.61, 212,084.30 and 85,704.88

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Solution

The fourth proportional to 153,683.61, 212,084.30 and 85,704.88 is: 118,273.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,683.61 : 212,084.30 = 85,704.88 : x
  2. Step 2: Convert to fraction form
    153,683.61/212,084.30 = 85,704.88/x
  3. Step 3: Cross multiply
    153,683.61x = 212,084.30 × 85,704.88
  4. Step 4: Simplify right side
    153,683.61x = 18,176,659,344.13
  5. Step 5: Solve for x
    x = 18,176,659,344.13/153,683.61
  6. Step 6: Final answer
    x = 118,273.25

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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.