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Finding the Fourth Proportional to 112,790, 155,655.30 and 62,489

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Solution

The fourth proportional to 112,790, 155,655.30 and 62,489 is: 86,237.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,790 : 155,655.30 = 62,489 : x
  2. Step 2: Convert to fraction form
    112,790/155,655.30 = 62,489/x
  3. Step 3: Cross multiply
    112,790x = 155,655.30 × 62,489
  4. Step 4: Simplify right side
    112,790x = 9,726,744,041.70
  5. Step 5: Solve for x
    x = 9,726,744,041.70/112,790
  6. Step 6: Final answer
    x = 86,237.65

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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.