Home / 100,899.90-139,242.81-55,578.06

Finding the Fourth Proportional to 100,899.90, 139,242.81 and 55,578.06

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Solution

The fourth proportional to 100,899.90, 139,242.81 and 55,578.06 is: 76,698.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,899.90 : 139,242.81 = 55,578.06 : x
  2. Step 2: Convert to fraction form
    100,899.90/139,242.81 = 55,578.06/x
  3. Step 3: Cross multiply
    100,899.90x = 139,242.81 × 55,578.06
  4. Step 4: Simplify right side
    100,899.90x = 7,738,845,248.75
  5. Step 5: Solve for x
    x = 7,738,845,248.75/100,899.90
  6. Step 6: Final answer
    x = 76,698.24

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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.