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Finding the Fourth Proportional to 212,099.79, 318,157.38 and 69,948.55

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Solution

The fourth proportional to 212,099.79, 318,157.38 and 69,948.55 is: 104,925.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,099.79 : 318,157.38 = 69,948.55 : x
  2. Step 2: Convert to fraction form
    212,099.79/318,157.38 = 69,948.55/x
  3. Step 3: Cross multiply
    212,099.79x = 318,157.38 × 69,948.55
  4. Step 4: Simplify right side
    212,099.79x = 22,254,647,402.80
  5. Step 5: Solve for x
    x = 22,254,647,402.80/212,099.79
  6. Step 6: Final answer
    x = 104,925.36

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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.