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Finding the Fourth Proportional to 100,754.33, 139,060.85 and 57,762.68

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Solution

The fourth proportional to 100,754.33, 139,060.85 and 57,762.68 is: 79,723.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,754.33 : 139,060.85 = 57,762.68 : x
  2. Step 2: Convert to fraction form
    100,754.33/139,060.85 = 57,762.68/x
  3. Step 3: Cross multiply
    100,754.33x = 139,060.85 × 57,762.68
  4. Step 4: Simplify right side
    100,754.33x = 8,032,527,437.92
  5. Step 5: Solve for x
    x = 8,032,527,437.92/100,754.33
  6. Step 6: Final answer
    x = 79,723.89

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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.