Home / 100,731.74-139,012.16-55,412.24

Finding the Fourth Proportional to 100,731.74, 139,012.16 and 55,412.24

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Solution

The fourth proportional to 100,731.74, 139,012.16 and 55,412.24 is: 76,470.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,731.74 : 139,012.16 = 55,412.24 : x
  2. Step 2: Convert to fraction form
    100,731.74/139,012.16 = 55,412.24/x
  3. Step 3: Cross multiply
    100,731.74x = 139,012.16 × 55,412.24
  4. Step 4: Simplify right side
    100,731.74x = 7,702,974,200.72
  5. Step 5: Solve for x
    x = 7,702,974,200.72/100,731.74
  6. Step 6: Final answer
    x = 76,470.18

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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.