Home / 212,434.73-318,700.10-70,279.67

Finding the Fourth Proportional to 212,434.73, 318,700.10 and 70,279.67

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Solution

The fourth proportional to 212,434.73, 318,700.10 and 70,279.67 is: 105,435.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,434.73 : 318,700.10 = 70,279.67 : x
  2. Step 2: Convert to fraction form
    212,434.73/318,700.10 = 70,279.67/x
  3. Step 3: Cross multiply
    212,434.73x = 318,700.10 × 70,279.67
  4. Step 4: Simplify right side
    212,434.73x = 22,398,137,856.97
  5. Step 5: Solve for x
    x = 22,398,137,856.97/212,434.73
  6. Step 6: Final answer
    x = 105,435.39

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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.