Home / 212,011.16-318,032.30-78,891.39

Finding the Fourth Proportional to 212,011.16, 318,032.30 and 78,891.39

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Solution

The fourth proportional to 212,011.16, 318,032.30 and 78,891.39 is: 118,342.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,011.16 : 318,032.30 = 78,891.39 : x
  2. Step 2: Convert to fraction form
    212,011.16/318,032.30 = 78,891.39/x
  3. Step 3: Cross multiply
    212,011.16x = 318,032.30 × 78,891.39
  4. Step 4: Simplify right side
    212,011.16x = 25,090,010,409.13
  5. Step 5: Solve for x
    x = 25,090,010,409.13/212,011.16
  6. Step 6: Final answer
    x = 118,342.88

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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.