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Finding the Fourth Proportional to 78,699.50, 118,005.96 and 53,767.70

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Solution

The fourth proportional to 78,699.50, 118,005.96 and 53,767.70 is: 80,621.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,699.50 : 118,005.96 = 53,767.70 : x
  2. Step 2: Convert to fraction form
    78,699.50/118,005.96 = 53,767.70/x
  3. Step 3: Cross multiply
    78,699.50x = 118,005.96 × 53,767.70
  4. Step 4: Simplify right side
    78,699.50x = 6,344,908,465.46
  5. Step 5: Solve for x
    x = 6,344,908,465.46/78,699.50
  6. Step 6: Final answer
    x = 80,621.97

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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.