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Finding the Fourth Proportional to 112,707.78, 155,536.38 and 62,406.78

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Solution

The fourth proportional to 112,707.78, 155,536.38 and 62,406.78 is: 86,121.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,707.78 : 155,536.38 = 62,406.78 : x
  2. Step 2: Convert to fraction form
    112,707.78/155,536.38 = 62,406.78/x
  3. Step 3: Cross multiply
    112,707.78x = 155,536.38 × 62,406.78
  4. Step 4: Simplify right side
    112,707.78x = 9,706,524,648.66
  5. Step 5: Solve for x
    x = 9,706,524,648.66/112,707.78
  6. Step 6: Final answer
    x = 86,121.16

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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.