Home / 78,690.05-108,590.85-42,880.35

Finding the Fourth Proportional to 78,690.05, 108,590.85 and 42,880.35

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Solution

The fourth proportional to 78,690.05, 108,590.85 and 42,880.35 is: 59,174.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,690.05 : 108,590.85 = 42,880.35 : x
  2. Step 2: Convert to fraction form
    78,690.05/108,590.85 = 42,880.35/x
  3. Step 3: Cross multiply
    78,690.05x = 108,590.85 × 42,880.35
  4. Step 4: Simplify right side
    78,690.05x = 4,656,413,654.80
  5. Step 5: Solve for x
    x = 4,656,413,654.80/78,690.05
  6. Step 6: Final answer
    x = 59,174.11

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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.