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Finding the Fourth Proportional to 78,951.70, 108,952.03 and 43,140.89

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Solution

The fourth proportional to 78,951.70, 108,952.03 and 43,140.89 is: 59,533.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,951.70 : 108,952.03 = 43,140.89 : x
  2. Step 2: Convert to fraction form
    78,951.70/108,952.03 = 43,140.89/x
  3. Step 3: Cross multiply
    78,951.70x = 108,952.03 × 43,140.89
  4. Step 4: Simplify right side
    78,951.70x = 4,700,286,888.89
  5. Step 5: Solve for x
    x = 4,700,286,888.89/78,951.70
  6. Step 6: Final answer
    x = 59,533.70

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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.