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Finding the Fourth Proportional to 112,787, 155,651.16 and 62,486

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Solution

The fourth proportional to 112,787, 155,651.16 and 62,486 is: 86,233.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,787 : 155,651.16 = 62,486 : x
  2. Step 2: Convert to fraction form
    112,787/155,651.16 = 62,486/x
  3. Step 3: Cross multiply
    112,787x = 155,651.16 × 62,486
  4. Step 4: Simplify right side
    112,787x = 9,726,018,383.76
  5. Step 5: Solve for x
    x = 9,726,018,383.76/112,787
  6. Step 6: Final answer
    x = 86,233.51

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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.