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Finding the Fourth Proportional to 213,089.60, 319,519.20 and 88,443.20

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Solution

The fourth proportional to 213,089.60, 319,519.20 and 88,443.20 is: 132,616.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,089.60 : 319,519.20 = 88,443.20 : x
  2. Step 2: Convert to fraction form
    213,089.60/319,519.20 = 88,443.20/x
  3. Step 3: Cross multiply
    213,089.60x = 319,519.20 × 88,443.20
  4. Step 4: Simplify right side
    213,089.60x = 28,259,300,509.44
  5. Step 5: Solve for x
    x = 28,259,300,509.44/213,089.60
  6. Step 6: Final answer
    x = 132,616.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.