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Finding the Fourth Proportional to 100,996.61, 139,369.05 and 55,672.25

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Solution

The fourth proportional to 100,996.61, 139,369.05 and 55,672.25 is: 76,824.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,996.61 : 139,369.05 = 55,672.25 : x
  2. Step 2: Convert to fraction form
    100,996.61/139,369.05 = 55,672.25/x
  3. Step 3: Cross multiply
    100,996.61x = 139,369.05 × 55,672.25
  4. Step 4: Simplify right side
    100,996.61x = 7,758,988,593.86
  5. Step 5: Solve for x
    x = 7,758,988,593.86/100,996.61
  6. Step 6: Final answer
    x = 76,824.25

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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.