Home / 70,899.35-106,312.12-20,972.70

Finding the Fourth Proportional to 70,899.35, 106,312.12 and 20,972.70

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Solution

The fourth proportional to 70,899.35, 106,312.12 and 20,972.70 is: 31,448.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,899.35 : 106,312.12 = 20,972.70 : x
  2. Step 2: Convert to fraction form
    70,899.35/106,312.12 = 20,972.70/x
  3. Step 3: Cross multiply
    70,899.35x = 106,312.12 × 20,972.70
  4. Step 4: Simplify right side
    70,899.35x = 2,229,652,579.43
  5. Step 5: Solve for x
    x = 2,229,652,579.43/70,899.35
  6. Step 6: Final answer
    x = 31,448.14

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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.