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Finding the Fourth Proportional to 212,401.52, 318,526.39 and 70,220.55

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Solution

The fourth proportional to 212,401.52, 318,526.39 and 70,220.55 is: 105,305.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,401.52 : 318,526.39 = 70,220.55 : x
  2. Step 2: Convert to fraction form
    212,401.52/318,526.39 = 70,220.55/x
  3. Step 3: Cross multiply
    212,401.52x = 318,526.39 × 70,220.55
  4. Step 4: Simplify right side
    212,401.52x = 22,367,098,295.31
  5. Step 5: Solve for x
    x = 22,367,098,295.31/212,401.52
  6. Step 6: Final answer
    x = 105,305.74

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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.