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Finding the Fourth Proportional to 101,790.35, 140,470.56 and 56,475.20

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Solution

The fourth proportional to 101,790.35, 140,470.56 and 56,475.20 is: 77,935.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,790.35 : 140,470.56 = 56,475.20 : x
  2. Step 2: Convert to fraction form
    101,790.35/140,470.56 = 56,475.20/x
  3. Step 3: Cross multiply
    101,790.35x = 140,470.56 × 56,475.20
  4. Step 4: Simplify right side
    101,790.35x = 7,933,102,970.11
  5. Step 5: Solve for x
    x = 7,933,102,970.11/101,790.35
  6. Step 6: Final answer
    x = 77,935.71

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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.