Home / 75,137.12-103,689.40-40,682.20

Finding the Fourth Proportional to 75,137.12, 103,689.40 and 40,682.20

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Solution

The fourth proportional to 75,137.12, 103,689.40 and 40,682.20 is: 56,141.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,137.12 : 103,689.40 = 40,682.20 : x
  2. Step 2: Convert to fraction form
    75,137.12/103,689.40 = 40,682.20/x
  3. Step 3: Cross multiply
    75,137.12x = 103,689.40 × 40,682.20
  4. Step 4: Simplify right side
    75,137.12x = 4,218,312,908.68
  5. Step 5: Solve for x
    x = 4,218,312,908.68/75,137.12
  6. Step 6: Final answer
    x = 56,141.53

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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.