Home / 100,756.74-139,061.70-58,338.66

Finding the Fourth Proportional to 100,756.74, 139,061.70 and 58,338.66

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Solution

The fourth proportional to 100,756.74, 139,061.70 and 58,338.66 is: 80,517.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,756.74 : 139,061.70 = 58,338.66 : x
  2. Step 2: Convert to fraction form
    100,756.74/139,061.70 = 58,338.66/x
  3. Step 3: Cross multiply
    100,756.74x = 139,061.70 × 58,338.66
  4. Step 4: Simplify right side
    100,756.74x = 8,112,673,235.32
  5. Step 5: Solve for x
    x = 8,112,673,235.32/100,756.74
  6. Step 6: Final answer
    x = 80,517.42

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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.