Home / 213,479.79-319,941.87-86,971.86

Finding the Fourth Proportional to 213,479.79, 319,941.87 and 86,971.86

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Solution

The fourth proportional to 213,479.79, 319,941.87 and 86,971.86 is: 130,344.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,479.79 : 319,941.87 = 86,971.86 : x
  2. Step 2: Convert to fraction form
    213,479.79/319,941.87 = 86,971.86/x
  3. Step 3: Cross multiply
    213,479.79x = 319,941.87 × 86,971.86
  4. Step 4: Simplify right side
    213,479.79x = 27,825,939,199.63
  5. Step 5: Solve for x
    x = 27,825,939,199.63/213,479.79
  6. Step 6: Final answer
    x = 130,344.61

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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.