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Finding the Fourth Proportional to 100,750.89, 139,036.53 and 55,433.52

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Solution

The fourth proportional to 100,750.89, 139,036.53 and 55,433.52 is: 76,498.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,750.89 : 139,036.53 = 55,433.52 : x
  2. Step 2: Convert to fraction form
    100,750.89/139,036.53 = 55,433.52/x
  3. Step 3: Cross multiply
    100,750.89x = 139,036.53 × 55,433.52
  4. Step 4: Simplify right side
    100,750.89x = 7,707,284,266.49
  5. Step 5: Solve for x
    x = 7,707,284,266.49/100,750.89
  6. Step 6: Final answer
    x = 76,498.42

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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.