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Finding the Fourth Proportional to 100,987.93, 139,371.38 and 55,674.01

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Solution

The fourth proportional to 100,987.93, 139,371.38 and 55,674.01 is: 76,834.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,987.93 : 139,371.38 = 55,674.01 : x
  2. Step 2: Convert to fraction form
    100,987.93/139,371.38 = 55,674.01/x
  3. Step 3: Cross multiply
    100,987.93x = 139,371.38 × 55,674.01
  4. Step 4: Simplify right side
    100,987.93x = 7,759,363,603.83
  5. Step 5: Solve for x
    x = 7,759,363,603.83/100,987.93
  6. Step 6: Final answer
    x = 76,834.56

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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.