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Finding the Fourth Proportional to 140,939.86, 194,496.96 and 77,276.32

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Solution

The fourth proportional to 140,939.86, 194,496.96 and 77,276.32 is: 106,641.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,939.86 : 194,496.96 = 77,276.32 : x
  2. Step 2: Convert to fraction form
    140,939.86/194,496.96 = 77,276.32/x
  3. Step 3: Cross multiply
    140,939.86x = 194,496.96 × 77,276.32
  4. Step 4: Simplify right side
    140,939.86x = 15,030,009,319.99
  5. Step 5: Solve for x
    x = 15,030,009,319.99/140,939.86
  6. Step 6: Final answer
    x = 106,641.30

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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.