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Finding the Fourth Proportional to 212,172.68, 318,297.42 and 64,424.84

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Solution

The fourth proportional to 212,172.68, 318,297.42 and 64,424.84 is: 96,648.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,172.68 : 318,297.42 = 64,424.84 : x
  2. Step 2: Convert to fraction form
    212,172.68/318,297.42 = 64,424.84/x
  3. Step 3: Cross multiply
    212,172.68x = 318,297.42 × 64,424.84
  4. Step 4: Simplify right side
    212,172.68x = 20,506,260,355.91
  5. Step 5: Solve for x
    x = 20,506,260,355.91/212,172.68
  6. Step 6: Final answer
    x = 96,648.92

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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.