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Finding the Fourth Proportional to 101,788.34, 140,468.76 and 56,469.28

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Solution

The fourth proportional to 101,788.34, 140,468.76 and 56,469.28 is: 77,928.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,788.34 : 140,468.76 = 56,469.28 : x
  2. Step 2: Convert to fraction form
    101,788.34/140,468.76 = 56,469.28/x
  3. Step 3: Cross multiply
    101,788.34x = 140,468.76 × 56,469.28
  4. Step 4: Simplify right side
    101,788.34x = 7,932,169,739.69
  5. Step 5: Solve for x
    x = 7,932,169,739.69/101,788.34
  6. Step 6: Final answer
    x = 77,928.08

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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.