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Finding the Fourth Proportional to 100,603.50, 138,832.83 and 55,891.50

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Solution

The fourth proportional to 100,603.50, 138,832.83 and 55,891.50 is: 77,130.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,603.50 : 138,832.83 = 55,891.50 : x
  2. Step 2: Convert to fraction form
    100,603.50/138,832.83 = 55,891.50/x
  3. Step 3: Cross multiply
    100,603.50x = 138,832.83 × 55,891.50
  4. Step 4: Simplify right side
    100,603.50x = 7,759,575,117.95
  5. Step 5: Solve for x
    x = 7,759,575,117.95/100,603.50
  6. Step 6: Final answer
    x = 77,130.27

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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.