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Finding the Fourth Proportional to 158,998.80, 219,422.16 and 87,380.40

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Solution

The fourth proportional to 158,998.80, 219,422.16 and 87,380.40 is: 120,587.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,998.80 : 219,422.16 = 87,380.40 : x
  2. Step 2: Convert to fraction form
    158,998.80/219,422.16 = 87,380.40/x
  3. Step 3: Cross multiply
    158,998.80x = 219,422.16 × 87,380.40
  4. Step 4: Simplify right side
    158,998.80x = 19,173,196,109.66
  5. Step 5: Solve for x
    x = 19,173,196,109.66/158,998.80
  6. Step 6: Final answer
    x = 120,587.05

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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.