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Finding the Fourth Proportional to 100,362.12, 138,489.72 and 57,934.32

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Solution

The fourth proportional to 100,362.12, 138,489.72 and 57,934.32 is: 79,943.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,362.12 : 138,489.72 = 57,934.32 : x
  2. Step 2: Convert to fraction form
    100,362.12/138,489.72 = 57,934.32/x
  3. Step 3: Cross multiply
    100,362.12x = 138,489.72 × 57,934.32
  4. Step 4: Simplify right side
    100,362.12x = 8,023,307,755.19
  5. Step 5: Solve for x
    x = 8,023,307,755.19/100,362.12
  6. Step 6: Final answer
    x = 79,943.59

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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.