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Finding the Fourth Proportional to 112,789, 155,653.92 and 62,488

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Solution

The fourth proportional to 112,789, 155,653.92 and 62,488 is: 86,236.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,789 : 155,653.92 = 62,488 : x
  2. Step 2: Convert to fraction form
    112,789/155,653.92 = 62,488/x
  3. Step 3: Cross multiply
    112,789x = 155,653.92 × 62,488
  4. Step 4: Simplify right side
    112,789x = 9,726,502,152.96
  5. Step 5: Solve for x
    x = 9,726,502,152.96/112,789
  6. Step 6: Final answer
    x = 86,236.27

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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.