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Finding the Fourth Proportional to 101,327.20, 151,990.80 and 77,999.20

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Solution

The fourth proportional to 101,327.20, 151,990.80 and 77,999.20 is: 116,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,327.20 : 151,990.80 = 77,999.20 : x
  2. Step 2: Convert to fraction form
    101,327.20/151,990.80 = 77,999.20/x
  3. Step 3: Cross multiply
    101,327.20x = 151,990.80 × 77,999.20
  4. Step 4: Simplify right side
    101,327.20x = 11,855,160,807.36
  5. Step 5: Solve for x
    x = 11,855,160,807.36/101,327.20
  6. Step 6: Final answer
    x = 116,998.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.