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Finding the Fourth Proportional to 145,778.13, 218,724.30 and 57,016.31

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Solution

The fourth proportional to 145,778.13, 218,724.30 and 57,016.31 is: 85,546.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,778.13 : 218,724.30 = 57,016.31 : x
  2. Step 2: Convert to fraction form
    145,778.13/218,724.30 = 57,016.31/x
  3. Step 3: Cross multiply
    145,778.13x = 218,724.30 × 57,016.31
  4. Step 4: Simplify right side
    145,778.13x = 12,470,851,399.71
  5. Step 5: Solve for x
    x = 12,470,851,399.71/145,778.13
  6. Step 6: Final answer
    x = 85,546.79

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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.