Home / 212,587.47-318,920.45-87,938.19

Finding the Fourth Proportional to 212,587.47, 318,920.45 and 87,938.19

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Solution

The fourth proportional to 212,587.47, 318,920.45 and 87,938.19 is: 131,923.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,587.47 : 318,920.45 = 87,938.19 : x
  2. Step 2: Convert to fraction form
    212,587.47/318,920.45 = 87,938.19/x
  3. Step 3: Cross multiply
    212,587.47x = 318,920.45 × 87,938.19
  4. Step 4: Simplify right side
    212,587.47x = 28,045,286,687.29
  5. Step 5: Solve for x
    x = 28,045,286,687.29/212,587.47
  6. Step 6: Final answer
    x = 131,923.52

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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.