Home / 78,375.92-108,158.38-42,565.64

Finding the Fourth Proportional to 78,375.92, 108,158.38 and 42,565.64

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Solution

The fourth proportional to 78,375.92, 108,158.38 and 42,565.64 is: 58,740.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,375.92 : 108,158.38 = 42,565.64 : x
  2. Step 2: Convert to fraction form
    78,375.92/108,158.38 = 42,565.64/x
  3. Step 3: Cross multiply
    78,375.92x = 108,158.38 × 42,565.64
  4. Step 4: Simplify right side
    78,375.92x = 4,603,830,666.06
  5. Step 5: Solve for x
    x = 4,603,830,666.06/78,375.92
  6. Step 6: Final answer
    x = 58,740.37

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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.