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Finding the Fourth Proportional to 75,297.68, 103,929.72 and 51,139.56

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Solution

The fourth proportional to 75,297.68, 103,929.72 and 51,139.56 is: 70,585.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,297.68 : 103,929.72 = 51,139.56 : x
  2. Step 2: Convert to fraction form
    75,297.68/103,929.72 = 51,139.56/x
  3. Step 3: Cross multiply
    75,297.68x = 103,929.72 × 51,139.56
  4. Step 4: Simplify right side
    75,297.68x = 5,314,920,151.72
  5. Step 5: Solve for x
    x = 5,314,920,151.72/75,297.68
  6. Step 6: Final answer
    x = 70,585.44

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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.