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Finding the Fourth Proportional to 78,779.94, 108,756.45 and 60,834.66

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Solution

The fourth proportional to 78,779.94, 108,756.45 and 60,834.66 is: 83,982.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,779.94 : 108,756.45 = 60,834.66 : x
  2. Step 2: Convert to fraction form
    78,779.94/108,756.45 = 60,834.66/x
  3. Step 3: Cross multiply
    78,779.94x = 108,756.45 × 60,834.66
  4. Step 4: Simplify right side
    78,779.94x = 6,616,161,658.56
  5. Step 5: Solve for x
    x = 6,616,161,658.56/78,779.94
  6. Step 6: Final answer
    x = 83,982.82

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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.