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Finding the Fourth Proportional to 159,412.95, 219,987.20 and 87,799.64

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Solution

The fourth proportional to 159,412.95, 219,987.20 and 87,799.64 is: 121,162.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,412.95 : 219,987.20 = 87,799.64 : x
  2. Step 2: Convert to fraction form
    159,412.95/219,987.20 = 87,799.64/x
  3. Step 3: Cross multiply
    159,412.95x = 219,987.20 × 87,799.64
  4. Step 4: Simplify right side
    159,412.95x = 19,314,795,425.67
  5. Step 5: Solve for x
    x = 19,314,795,425.67/159,412.95
  6. Step 6: Final answer
    x = 121,162.02

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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.