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Finding the Fourth Proportional to 79,077.70, 118,555.80 and 39,663.10

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Solution

The fourth proportional to 79,077.70, 118,555.80 and 39,663.10 is: 59,464.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,077.70 : 118,555.80 = 39,663.10 : x
  2. Step 2: Convert to fraction form
    79,077.70/118,555.80 = 39,663.10/x
  3. Step 3: Cross multiply
    79,077.70x = 118,555.80 × 39,663.10
  4. Step 4: Simplify right side
    79,077.70x = 4,702,290,550.98
  5. Step 5: Solve for x
    x = 4,702,290,550.98/79,077.70
  6. Step 6: Final answer
    x = 59,464.18

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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.