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Finding the Fourth Proportional to 212,869.80, 318,915.90 and 173,212.20

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Solution

The fourth proportional to 212,869.80, 318,915.90 and 173,212.20 is: 259,501.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,869.80 : 318,915.90 = 173,212.20 : x
  2. Step 2: Convert to fraction form
    212,869.80/318,915.90 = 173,212.20/x
  3. Step 3: Cross multiply
    212,869.80x = 318,915.90 × 173,212.20
  4. Step 4: Simplify right side
    212,869.80x = 55,240,124,653.98
  5. Step 5: Solve for x
    x = 55,240,124,653.98/212,869.80
  6. Step 6: Final answer
    x = 259,501.93

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1.5x scale

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.