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Finding the Fourth Proportional to 157,705.60, 217,638.88 and 86,089.46

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Solution

The fourth proportional to 157,705.60, 217,638.88 and 86,089.46 is: 118,806.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,705.60 : 217,638.88 = 86,089.46 : x
  2. Step 2: Convert to fraction form
    157,705.60/217,638.88 = 86,089.46/x
  3. Step 3: Cross multiply
    157,705.60x = 217,638.88 × 86,089.46
  4. Step 4: Simplify right side
    157,705.60x = 18,736,413,654.20
  5. Step 5: Solve for x
    x = 18,736,413,654.20/157,705.60
  6. Step 6: Final answer
    x = 118,806.27

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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.