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Finding the Fourth Proportional to 101,432.61, 139,929.84 and 65,634.15

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Solution

The fourth proportional to 101,432.61, 139,929.84 and 65,634.15 is: 90,544.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,432.61 : 139,929.84 = 65,634.15 : x
  2. Step 2: Convert to fraction form
    101,432.61/139,929.84 = 65,634.15/x
  3. Step 3: Cross multiply
    101,432.61x = 139,929.84 × 65,634.15
  4. Step 4: Simplify right side
    101,432.61x = 9,184,176,108.04
  5. Step 5: Solve for x
    x = 9,184,176,108.04/101,432.61
  6. Step 6: Final answer
    x = 90,544.61

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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.