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Finding the Fourth Proportional to 100,445.72, 150,693.66 and 70,921.28

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Solution

The fourth proportional to 100,445.72, 150,693.66 and 70,921.28 is: 106,399.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,445.72 : 150,693.66 = 70,921.28 : x
  2. Step 2: Convert to fraction form
    100,445.72/150,693.66 = 70,921.28/x
  3. Step 3: Cross multiply
    100,445.72x = 150,693.66 × 70,921.28
  4. Step 4: Simplify right side
    100,445.72x = 10,687,387,255.08
  5. Step 5: Solve for x
    x = 10,687,387,255.08/100,445.72
  6. Step 6: Final answer
    x = 106,399.63

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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.