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Finding the Fourth Proportional to 138,987.56, 208,479.30 and 44,223.52

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Solution

The fourth proportional to 138,987.56, 208,479.30 and 44,223.52 is: 66,334.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,987.56 : 208,479.30 = 44,223.52 : x
  2. Step 2: Convert to fraction form
    138,987.56/208,479.30 = 44,223.52/x
  3. Step 3: Cross multiply
    138,987.56x = 208,479.30 × 44,223.52
  4. Step 4: Simplify right side
    138,987.56x = 9,219,688,493.14
  5. Step 5: Solve for x
    x = 9,219,688,493.14/138,987.56
  6. Step 6: Final answer
    x = 66,334.63

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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.