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Finding the Fourth Proportional to 70,210.04, 105,299.54 and 20,279.30

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Solution

The fourth proportional to 70,210.04, 105,299.54 and 20,279.30 is: 30,414.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,210.04 : 105,299.54 = 20,279.30 : x
  2. Step 2: Convert to fraction form
    70,210.04/105,299.54 = 20,279.30/x
  3. Step 3: Cross multiply
    70,210.04x = 105,299.54 × 20,279.30
  4. Step 4: Simplify right side
    70,210.04x = 2,135,400,961.52
  5. Step 5: Solve for x
    x = 2,135,400,961.52/70,210.04
  6. Step 6: Final answer
    x = 30,414.47

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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.