Home / 213,210.60-319,815.27-86,821.08

Finding the Fourth Proportional to 213,210.60, 319,815.27 and 86,821.08

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Solution

The fourth proportional to 213,210.60, 319,815.27 and 86,821.08 is: 130,231.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,210.60 : 319,815.27 = 86,821.08 : x
  2. Step 2: Convert to fraction form
    213,210.60/319,815.27 = 86,821.08/x
  3. Step 3: Cross multiply
    213,210.60x = 319,815.27 × 86,821.08
  4. Step 4: Simplify right side
    213,210.60x = 27,766,707,141.89
  5. Step 5: Solve for x
    x = 27,766,707,141.89/213,210.60
  6. Step 6: Final answer
    x = 130,231.36

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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.