Home / 145,541.70-218,052.84-78,939.36

Finding the Fourth Proportional to 145,541.70, 218,052.84 and 78,939.36

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Solution

The fourth proportional to 145,541.70, 218,052.84 and 78,939.36 is: 118,268.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,541.70 : 218,052.84 = 78,939.36 : x
  2. Step 2: Convert to fraction form
    145,541.70/218,052.84 = 78,939.36/x
  3. Step 3: Cross multiply
    145,541.70x = 218,052.84 × 78,939.36
  4. Step 4: Simplify right side
    145,541.70x = 17,212,951,635.78
  5. Step 5: Solve for x
    x = 17,212,951,635.78/145,541.70
  6. Step 6: Final answer
    x = 118,268.18

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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.