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Finding the Fourth Proportional to 153,685.60, 212,087.06 and 85,706.88

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Solution

The fourth proportional to 153,685.60, 212,087.06 and 85,706.88 is: 118,276.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,685.60 : 212,087.06 = 85,706.88 : x
  2. Step 2: Convert to fraction form
    153,685.60/212,087.06 = 85,706.88/x
  3. Step 3: Cross multiply
    153,685.60x = 212,087.06 × 85,706.88
  4. Step 4: Simplify right side
    153,685.60x = 18,177,320,200.97
  5. Step 5: Solve for x
    x = 18,177,320,200.97/153,685.60
  6. Step 6: Final answer
    x = 118,276.01

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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.