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Finding the Fourth Proportional to 113,705.76, 156,957.18 and 85,493.40

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Solution

The fourth proportional to 113,705.76, 156,957.18 and 85,493.40 is: 118,013.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,705.76 : 156,957.18 = 85,493.40 : x
  2. Step 2: Convert to fraction form
    113,705.76/156,957.18 = 85,493.40/x
  3. Step 3: Cross multiply
    113,705.76x = 156,957.18 × 85,493.40
  4. Step 4: Simplify right side
    113,705.76x = 13,418,802,972.61
  5. Step 5: Solve for x
    x = 13,418,802,972.61/113,705.76
  6. Step 6: Final answer
    x = 118,013.40

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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.