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Finding the Fourth Proportional to 100,649.52, 138,909.48 and 64,943.44

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Solution

The fourth proportional to 100,649.52, 138,909.48 and 64,943.44 is: 89,630.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,649.52 : 138,909.48 = 64,943.44 : x
  2. Step 2: Convert to fraction form
    100,649.52/138,909.48 = 64,943.44/x
  3. Step 3: Cross multiply
    100,649.52x = 138,909.48 × 64,943.44
  4. Step 4: Simplify right side
    100,649.52x = 9,021,259,479.81
  5. Step 5: Solve for x
    x = 9,021,259,479.81/100,649.52
  6. Step 6: Final answer
    x = 89,630.43

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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.