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Finding the Fourth Proportional to 112,693.77, 168,772.31 and 65,208.79

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Solution

The fourth proportional to 112,693.77, 168,772.31 and 65,208.79 is: 97,657.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,693.77 : 168,772.31 = 65,208.79 : x
  2. Step 2: Convert to fraction form
    112,693.77/168,772.31 = 65,208.79/x
  3. Step 3: Cross multiply
    112,693.77x = 168,772.31 × 65,208.79
  4. Step 4: Simplify right side
    112,693.77x = 11,005,438,120.60
  5. Step 5: Solve for x
    x = 11,005,438,120.60/112,693.77
  6. Step 6: Final answer
    x = 97,657.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.