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Finding the Fourth Proportional to 70,158.23, 105,278.86 and 25,816.12

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Solution

The fourth proportional to 70,158.23, 105,278.86 and 25,816.12 is: 38,739.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,158.23 : 105,278.86 = 25,816.12 : x
  2. Step 2: Convert to fraction form
    70,158.23/105,278.86 = 25,816.12/x
  3. Step 3: Cross multiply
    70,158.23x = 105,278.86 × 25,816.12
  4. Step 4: Simplify right side
    70,158.23x = 2,717,891,683.22
  5. Step 5: Solve for x
    x = 2,717,891,683.22/70,158.23
  6. Step 6: Final answer
    x = 38,739.46

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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.