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Finding the Fourth Proportional to 100,984.68, 139,366.89 and 55,670.76

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Solution

The fourth proportional to 100,984.68, 139,366.89 and 55,670.76 is: 76,830.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,984.68 : 139,366.89 = 55,670.76 : x
  2. Step 2: Convert to fraction form
    100,984.68/139,366.89 = 55,670.76/x
  3. Step 3: Cross multiply
    100,984.68x = 139,366.89 × 55,670.76
  4. Step 4: Simplify right side
    100,984.68x = 7,758,660,685.14
  5. Step 5: Solve for x
    x = 7,758,660,685.14/100,984.68
  6. Step 6: Final answer
    x = 76,830.08

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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.