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Finding the Fourth Proportional to 100,891.88, 139,184.04 and 65,093.32

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Solution

The fourth proportional to 100,891.88, 139,184.04 and 65,093.32 is: 89,798.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,891.88 : 139,184.04 = 65,093.32 : x
  2. Step 2: Convert to fraction form
    100,891.88/139,184.04 = 65,093.32/x
  3. Step 3: Cross multiply
    100,891.88x = 139,184.04 × 65,093.32
  4. Step 4: Simplify right side
    100,891.88x = 9,059,951,254.61
  5. Step 5: Solve for x
    x = 9,059,951,254.61/100,891.88
  6. Step 6: Final answer
    x = 89,798.62

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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.