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Finding the Fourth Proportional to 158,620.34, 218,910.11 and 87,014.31

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Solution

The fourth proportional to 158,620.34, 218,910.11 and 87,014.31 is: 120,087.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,620.34 : 218,910.11 = 87,014.31 : x
  2. Step 2: Convert to fraction form
    158,620.34/218,910.11 = 87,014.31/x
  3. Step 3: Cross multiply
    158,620.34x = 218,910.11 × 87,014.31
  4. Step 4: Simplify right side
    158,620.34x = 19,048,312,173.67
  5. Step 5: Solve for x
    x = 19,048,312,173.67/158,620.34
  6. Step 6: Final answer
    x = 120,087.45

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1.5x scale

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.