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Finding the Fourth Proportional to 100,860, 139,195.44 and 56,156.64

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Solution

The fourth proportional to 100,860, 139,195.44 and 56,156.64 is: 77,500.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,860 : 139,195.44 = 56,156.64 : x
  2. Step 2: Convert to fraction form
    100,860/139,195.44 = 56,156.64/x
  3. Step 3: Cross multiply
    100,860x = 139,195.44 × 56,156.64
  4. Step 4: Simplify right side
    100,860x = 7,816,748,213.72
  5. Step 5: Solve for x
    x = 7,816,748,213.72/100,860
  6. Step 6: Final answer
    x = 77,500.97

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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.