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Finding the Fourth Proportional to 101,064.60, 151,499.70 and 78,562.80

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Solution

The fourth proportional to 101,064.60, 151,499.70 and 78,562.80 is: 117,768.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,064.60 : 151,499.70 = 78,562.80 : x
  2. Step 2: Convert to fraction form
    101,064.60/151,499.70 = 78,562.80/x
  3. Step 3: Cross multiply
    101,064.60x = 151,499.70 × 78,562.80
  4. Step 4: Simplify right side
    101,064.60x = 11,902,240,631.16
  5. Step 5: Solve for x
    x = 11,902,240,631.16/101,064.60
  6. Step 6: Final answer
    x = 117,768.64

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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.