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Finding the Fourth Proportional to 113,531.76, 156,678.67 and 63,230.76

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Solution

The fourth proportional to 113,531.76, 156,678.67 and 63,230.76 is: 87,261.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,531.76 : 156,678.67 = 63,230.76 : x
  2. Step 2: Convert to fraction form
    113,531.76/156,678.67 = 63,230.76/x
  3. Step 3: Cross multiply
    113,531.76x = 156,678.67 × 63,230.76
  4. Step 4: Simplify right side
    113,531.76x = 9,906,911,379.89
  5. Step 5: Solve for x
    x = 9,906,911,379.89/113,531.76
  6. Step 6: Final answer
    x = 87,261.15

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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.