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Finding the Fourth Proportional to 112,701.78, 155,528.10 and 62,400.78

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Solution

The fourth proportional to 112,701.78, 155,528.10 and 62,400.78 is: 86,112.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,701.78 : 155,528.10 = 62,400.78 : x
  2. Step 2: Convert to fraction form
    112,701.78/155,528.10 = 62,400.78/x
  3. Step 3: Cross multiply
    112,701.78x = 155,528.10 × 62,400.78
  4. Step 4: Simplify right side
    112,701.78x = 9,705,074,751.92
  5. Step 5: Solve for x
    x = 9,705,074,751.92/112,701.78
  6. Step 6: Final answer
    x = 86,112.88

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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.