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Finding the Fourth Proportional to 78,947.66, 108,948.53 and 43,137.66

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Solution

The fourth proportional to 78,947.66, 108,948.53 and 43,137.66 is: 59,530.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,947.66 : 108,948.53 = 43,137.66 : x
  2. Step 2: Convert to fraction form
    78,947.66/108,948.53 = 43,137.66/x
  3. Step 3: Cross multiply
    78,947.66x = 108,948.53 × 43,137.66
  4. Step 4: Simplify right side
    78,947.66x = 4,699,784,644.64
  5. Step 5: Solve for x
    x = 4,699,784,644.64/78,947.66
  6. Step 6: Final answer
    x = 59,530.39

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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.