Home / 212,345.18-318,295.65-79,167.50

Finding the Fourth Proportional to 212,345.18, 318,295.65 and 79,167.50

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Solution

The fourth proportional to 212,345.18, 318,295.65 and 79,167.50 is: 118,668.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,345.18 : 318,295.65 = 79,167.50 : x
  2. Step 2: Convert to fraction form
    212,345.18/318,295.65 = 79,167.50/x
  3. Step 3: Cross multiply
    212,345.18x = 318,295.65 × 79,167.50
  4. Step 4: Simplify right side
    212,345.18x = 25,198,670,871.38
  5. Step 5: Solve for x
    x = 25,198,670,871.38/212,345.18
  6. Step 6: Final answer
    x = 118,668.44

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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.