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Finding the Fourth Proportional to 112,879, 155,777.88 and 62,578

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Solution

The fourth proportional to 112,879, 155,777.88 and 62,578 is: 86,360.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,879 : 155,777.88 = 62,578 : x
  2. Step 2: Convert to fraction form
    112,879/155,777.88 = 62,578/x
  3. Step 3: Cross multiply
    112,879x = 155,777.88 × 62,578
  4. Step 4: Simplify right side
    112,879x = 9,748,268,174.64
  5. Step 5: Solve for x
    x = 9,748,268,174.64/112,879
  6. Step 6: Final answer
    x = 86,360.33

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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.