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Finding the Fourth Proportional to 100,908.48, 139,222.26 and 57,293.76

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Solution

The fourth proportional to 100,908.48, 139,222.26 and 57,293.76 is: 79,047.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,908.48 : 139,222.26 = 57,293.76 : x
  2. Step 2: Convert to fraction form
    100,908.48/139,222.26 = 57,293.76/x
  3. Step 3: Cross multiply
    100,908.48x = 139,222.26 × 57,293.76
  4. Step 4: Simplify right side
    100,908.48x = 7,976,566,751.10
  5. Step 5: Solve for x
    x = 7,976,566,751.10/100,908.48
  6. Step 6: Final answer
    x = 79,047.54

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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.