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Finding the Fourth Proportional to 265,572.68, 398,436.78 and 78,589.04

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Solution

The fourth proportional to 265,572.68, 398,436.78 and 78,589.04 is: 117,906.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,572.68 : 398,436.78 = 78,589.04 : x
  2. Step 2: Convert to fraction form
    265,572.68/398,436.78 = 78,589.04/x
  3. Step 3: Cross multiply
    265,572.68x = 398,436.78 × 78,589.04
  4. Step 4: Simplify right side
    265,572.68x = 31,312,764,040.89
  5. Step 5: Solve for x
    x = 31,312,764,040.89/265,572.68
  6. Step 6: Final answer
    x = 117,906.57

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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.