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Finding the Fourth Proportional to 112,288, 154,957.44 and 61,987.36

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Solution

The fourth proportional to 112,288, 154,957.44 and 61,987.36 is: 85,542.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,288 : 154,957.44 = 61,987.36 : x
  2. Step 2: Convert to fraction form
    112,288/154,957.44 = 61,987.36/x
  3. Step 3: Cross multiply
    112,288x = 154,957.44 × 61,987.36
  4. Step 4: Simplify right side
    112,288x = 9,605,402,617.96
  5. Step 5: Solve for x
    x = 9,605,402,617.96/112,288
  6. Step 6: Final answer
    x = 85,542.56

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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.