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Finding the Fourth Proportional to 216,979.20, 325,468.80 and 181,987.20

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Solution

The fourth proportional to 216,979.20, 325,468.80 and 181,987.20 is: 272,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,979.20 : 325,468.80 = 181,987.20 : x
  2. Step 2: Convert to fraction form
    216,979.20/325,468.80 = 181,987.20/x
  3. Step 3: Cross multiply
    216,979.20x = 325,468.80 × 181,987.20
  4. Step 4: Simplify right side
    216,979.20x = 59,231,155,599.36
  5. Step 5: Solve for x
    x = 59,231,155,599.36/216,979.20
  6. Step 6: Final answer
    x = 272,980.80

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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.