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Finding the Fourth Proportional to 67,435.20, 93,067.20 and 39,139.20

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Solution

The fourth proportional to 67,435.20, 93,067.20 and 39,139.20 is: 54,015.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,435.20 : 93,067.20 = 39,139.20 : x
  2. Step 2: Convert to fraction form
    67,435.20/93,067.20 = 39,139.20/x
  3. Step 3: Cross multiply
    67,435.20x = 93,067.20 × 39,139.20
  4. Step 4: Simplify right side
    67,435.20x = 3,642,575,754.24
  5. Step 5: Solve for x
    x = 3,642,575,754.24/67,435.20
  6. Step 6: Final answer
    x = 54,015.94

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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.