Home / 77,913.20-107,519.85-42,103.10

Finding the Fourth Proportional to 77,913.20, 107,519.85 and 42,103.10

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Solution

The fourth proportional to 77,913.20, 107,519.85 and 42,103.10 is: 58,102.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,913.20 : 107,519.85 = 42,103.10 : x
  2. Step 2: Convert to fraction form
    77,913.20/107,519.85 = 42,103.10/x
  3. Step 3: Cross multiply
    77,913.20x = 107,519.85 × 42,103.10
  4. Step 4: Simplify right side
    77,913.20x = 4,526,918,458.94
  5. Step 5: Solve for x
    x = 4,526,918,458.94/77,913.20
  6. Step 6: Final answer
    x = 58,102.08

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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.