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Finding the Fourth Proportional to 158,620.10, 218,909.78 and 87,014.07

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Solution

The fourth proportional to 158,620.10, 218,909.78 and 87,014.07 is: 120,087.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,620.10 : 218,909.78 = 87,014.07 : x
  2. Step 2: Convert to fraction form
    158,620.10/218,909.78 = 87,014.07/x
  3. Step 3: Cross multiply
    158,620.10x = 218,909.78 × 87,014.07
  4. Step 4: Simplify right side
    158,620.10x = 19,048,230,485.53
  5. Step 5: Solve for x
    x = 19,048,230,485.53/158,620.10
  6. Step 6: Final answer
    x = 120,087.12

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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.