Home / 75,146.09-112,719.12-18,986.36

Finding the Fourth Proportional to 75,146.09, 112,719.12 and 18,986.36

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Solution

The fourth proportional to 75,146.09, 112,719.12 and 18,986.36 is: 28,479.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,146.09 : 112,719.12 = 18,986.36 : x
  2. Step 2: Convert to fraction form
    75,146.09/112,719.12 = 18,986.36/x
  3. Step 3: Cross multiply
    75,146.09x = 112,719.12 × 18,986.36
  4. Step 4: Simplify right side
    75,146.09x = 2,140,125,227.61
  5. Step 5: Solve for x
    x = 2,140,125,227.61/75,146.09
  6. Step 6: Final answer
    x = 28,479.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.