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Finding the Fourth Proportional to 70,850.46, 106,250.64 and 20,917.20

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Solution

The fourth proportional to 70,850.46, 106,250.64 and 20,917.20 is: 31,368.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,850.46 : 106,250.64 = 20,917.20 : x
  2. Step 2: Convert to fraction form
    70,850.46/106,250.64 = 20,917.20/x
  3. Step 3: Cross multiply
    70,850.46x = 106,250.64 × 20,917.20
  4. Step 4: Simplify right side
    70,850.46x = 2,222,465,887.01
  5. Step 5: Solve for x
    x = 2,222,465,887.01/70,850.46
  6. Step 6: Final answer
    x = 31,368.40

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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.