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Finding the Fourth Proportional to 78,805.54, 108,751.38 and 42,995.56

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Solution

The fourth proportional to 78,805.54, 108,751.38 and 42,995.56 is: 59,333.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,805.54 : 108,751.38 = 42,995.56 : x
  2. Step 2: Convert to fraction form
    78,805.54/108,751.38 = 42,995.56/x
  3. Step 3: Cross multiply
    78,805.54x = 108,751.38 × 42,995.56
  4. Step 4: Simplify right side
    78,805.54x = 4,675,826,483.87
  5. Step 5: Solve for x
    x = 4,675,826,483.87/78,805.54
  6. Step 6: Final answer
    x = 59,333.73

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1.5x scale

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.