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Finding the Fourth Proportional to 66,920.68, 100,536.54 and 39,238.12

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Solution

The fourth proportional to 66,920.68, 100,536.54 and 39,238.12 is: 58,948.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,920.68 : 100,536.54 = 39,238.12 : x
  2. Step 2: Convert to fraction form
    66,920.68/100,536.54 = 39,238.12/x
  3. Step 3: Cross multiply
    66,920.68x = 100,536.54 × 39,238.12
  4. Step 4: Simplify right side
    66,920.68x = 3,944,864,820.90
  5. Step 5: Solve for x
    x = 3,944,864,820.90/66,920.68
  6. Step 6: Final answer
    x = 58,948.37

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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.