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Finding the Fourth Proportional to 78,811.17, 108,759.76 and 43,001.93

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Solution

The fourth proportional to 78,811.17, 108,759.76 and 43,001.93 is: 59,342.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,811.17 : 108,759.76 = 43,001.93 : x
  2. Step 2: Convert to fraction form
    78,811.17/108,759.76 = 43,001.93/x
  3. Step 3: Cross multiply
    78,811.17x = 108,759.76 × 43,001.93
  4. Step 4: Simplify right side
    78,811.17x = 4,676,879,586.34
  5. Step 5: Solve for x
    x = 4,676,879,586.34/78,811.17
  6. Step 6: Final answer
    x = 59,342.85

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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.