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Finding the Fourth Proportional to 112,772.70, 155,626.92 and 63,714.54

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Solution

The fourth proportional to 112,772.70, 155,626.92 and 63,714.54 is: 87,926.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,772.70 : 155,626.92 = 63,714.54 : x
  2. Step 2: Convert to fraction form
    112,772.70/155,626.92 = 63,714.54/x
  3. Step 3: Cross multiply
    112,772.70x = 155,626.92 × 63,714.54
  4. Step 4: Simplify right side
    112,772.70x = 9,915,697,619.42
  5. Step 5: Solve for x
    x = 9,915,697,619.42/112,772.70
  6. Step 6: Final answer
    x = 87,926.40

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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.