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Finding the Fourth Proportional to 158,809.68, 219,147.54 and 87,189.30

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Solution

The fourth proportional to 158,809.68, 219,147.54 and 87,189.30 is: 120,315.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,809.68 : 219,147.54 = 87,189.30 : x
  2. Step 2: Convert to fraction form
    158,809.68/219,147.54 = 87,189.30/x
  3. Step 3: Cross multiply
    158,809.68x = 219,147.54 × 87,189.30
  4. Step 4: Simplify right side
    158,809.68x = 19,107,320,609.32
  5. Step 5: Solve for x
    x = 19,107,320,609.32/158,809.68
  6. Step 6: Final answer
    x = 120,315.84

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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.