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Finding the Fourth Proportional to 78,821.55, 110,626.65 and 78,821.55

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Solution

The fourth proportional to 78,821.55, 110,626.65 and 78,821.55 is: 110,626.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,821.55 : 110,626.65 = 78,821.55 : x
  2. Step 2: Convert to fraction form
    78,821.55/110,626.65 = 78,821.55/x
  3. Step 3: Cross multiply
    78,821.55x = 110,626.65 × 78,821.55
  4. Step 4: Simplify right side
    78,821.55x = 8,719,764,024.31
  5. Step 5: Solve for x
    x = 8,719,764,024.31/78,821.55
  6. Step 6: Final answer
    x = 110,626.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.