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Finding the Fourth Proportional to 212,862.80, 318,948.60 and 133,835.60

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Solution

The fourth proportional to 212,862.80, 318,948.60 and 133,835.60 is: 200,536.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,862.80 : 318,948.60 = 133,835.60 : x
  2. Step 2: Convert to fraction form
    212,862.80/318,948.60 = 133,835.60/x
  3. Step 3: Cross multiply
    212,862.80x = 318,948.60 × 133,835.60
  4. Step 4: Simplify right side
    212,862.80x = 42,686,677,250.16
  5. Step 5: Solve for x
    x = 42,686,677,250.16/212,862.80
  6. Step 6: Final answer
    x = 200,536.11

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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.