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Finding the Fourth Proportional to 79,320.30, 118,980.45 and 60,657.90

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Solution

The fourth proportional to 79,320.30, 118,980.45 and 60,657.90 is: 90,986.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,320.30 : 118,980.45 = 60,657.90 : x
  2. Step 2: Convert to fraction form
    79,320.30/118,980.45 = 60,657.90/x
  3. Step 3: Cross multiply
    79,320.30x = 118,980.45 × 60,657.90
  4. Step 4: Simplify right side
    79,320.30x = 7,217,104,238.06
  5. Step 5: Solve for x
    x = 7,217,104,238.06/79,320.30
  6. Step 6: Final answer
    x = 90,986.85

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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.