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Finding the Fourth Proportional to 100,751.84, 139,057.40 and 57,760.19

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Solution

The fourth proportional to 100,751.84, 139,057.40 and 57,760.19 is: 79,720.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,751.84 : 139,057.40 = 57,760.19 : x
  2. Step 2: Convert to fraction form
    100,751.84/139,057.40 = 57,760.19/x
  3. Step 3: Cross multiply
    100,751.84x = 139,057.40 × 57,760.19
  4. Step 4: Simplify right side
    100,751.84x = 8,031,980,860.82
  5. Step 5: Solve for x
    x = 8,031,980,860.82/100,751.84
  6. Step 6: Final answer
    x = 79,720.44

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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.