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Finding the Fourth Proportional to 78,876.63, 108,848.93 and 43,066.53

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Solution

The fourth proportional to 78,876.63, 108,848.93 and 43,066.53 is: 59,431.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,876.63 : 108,848.93 = 43,066.53 : x
  2. Step 2: Convert to fraction form
    78,876.63/108,848.93 = 43,066.53/x
  3. Step 3: Cross multiply
    78,876.63x = 108,848.93 × 43,066.53
  4. Step 4: Simplify right side
    78,876.63x = 4,687,745,493.98
  5. Step 5: Solve for x
    x = 4,687,745,493.98/78,876.63
  6. Step 6: Final answer
    x = 59,431.36

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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.