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Finding the Fourth Proportional to 100,953.69, 139,322.19 and 55,631.61

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Solution

The fourth proportional to 100,953.69, 139,322.19 and 55,631.61 is: 76,774.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,953.69 : 139,322.19 = 55,631.61 : x
  2. Step 2: Convert to fraction form
    100,953.69/139,322.19 = 55,631.61/x
  3. Step 3: Cross multiply
    100,953.69x = 139,322.19 × 55,631.61
  4. Step 4: Simplify right side
    100,953.69x = 7,750,717,738.43
  5. Step 5: Solve for x
    x = 7,750,717,738.43/100,953.69
  6. Step 6: Final answer
    x = 76,774.98

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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.