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Finding the Fourth Proportional to 212,141.01, 318,299.64 and 85,870.52

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Solution

The fourth proportional to 212,141.01, 318,299.64 and 85,870.52 is: 128,841.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,141.01 : 318,299.64 = 85,870.52 : x
  2. Step 2: Convert to fraction form
    212,141.01/318,299.64 = 85,870.52/x
  3. Step 3: Cross multiply
    212,141.01x = 318,299.64 × 85,870.52
  4. Step 4: Simplify right side
    212,141.01x = 27,332,554,011.11
  5. Step 5: Solve for x
    x = 27,332,554,011.11/212,141.01
  6. Step 6: Final answer
    x = 128,841.44

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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.