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Finding the Fourth Proportional to 100,633.68, 138,887.61 and 64,927.56

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Solution

The fourth proportional to 100,633.68, 138,887.61 and 64,927.56 is: 89,608.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,633.68 : 138,887.61 = 64,927.56 : x
  2. Step 2: Convert to fraction form
    100,633.68/138,887.61 = 64,927.56/x
  3. Step 3: Cross multiply
    100,633.68x = 138,887.61 × 64,927.56
  4. Step 4: Simplify right side
    100,633.68x = 9,017,634,196.29
  5. Step 5: Solve for x
    x = 9,017,634,196.29/100,633.68
  6. Step 6: Final answer
    x = 89,608.51

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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.