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Finding the Fourth Proportional to 70,190.10, 105,285.15 and 66,734.10

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Solution

The fourth proportional to 70,190.10, 105,285.15 and 66,734.10 is: 100,101.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,190.10 : 105,285.15 = 66,734.10 : x
  2. Step 2: Convert to fraction form
    70,190.10/105,285.15 = 66,734.10/x
  3. Step 3: Cross multiply
    70,190.10x = 105,285.15 × 66,734.10
  4. Step 4: Simplify right side
    70,190.10x = 7,026,109,728.62
  5. Step 5: Solve for x
    x = 7,026,109,728.62/70,190.10
  6. Step 6: Final answer
    x = 100,101.15

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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.