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Finding the Fourth Proportional to 70,219.10, 105,279.44 and 25,840.10

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Solution

The fourth proportional to 70,219.10, 105,279.44 and 25,840.10 is: 38,742.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,219.10 : 105,279.44 = 25,840.10 : x
  2. Step 2: Convert to fraction form
    70,219.10/105,279.44 = 25,840.10/x
  3. Step 3: Cross multiply
    70,219.10x = 105,279.44 × 25,840.10
  4. Step 4: Simplify right side
    70,219.10x = 2,720,430,601.95
  5. Step 5: Solve for x
    x = 2,720,430,601.95/70,219.10
  6. Step 6: Final answer
    x = 38,742.03

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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.