Home / 100,765.38-139,075.47-66,713.79

Finding the Fourth Proportional to 100,765.38, 139,075.47 and 66,713.79

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Solution

The fourth proportional to 100,765.38, 139,075.47 and 66,713.79 is: 92,077.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,765.38 : 139,075.47 = 66,713.79 : x
  2. Step 2: Convert to fraction form
    100,765.38/139,075.47 = 66,713.79/x
  3. Step 3: Cross multiply
    100,765.38x = 139,075.47 × 66,713.79
  4. Step 4: Simplify right side
    100,765.38x = 9,278,251,699.73
  5. Step 5: Solve for x
    x = 9,278,251,699.73/100,765.38
  6. Step 6: Final answer
    x = 92,077.77

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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.