Home / 145,789.46-218,753.31-86,741.78

Finding the Fourth Proportional to 145,789.46, 218,753.31 and 86,741.78

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Solution

The fourth proportional to 145,789.46, 218,753.31 and 86,741.78 is: 130,153.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,789.46 : 218,753.31 = 86,741.78 : x
  2. Step 2: Convert to fraction form
    145,789.46/218,753.31 = 86,741.78/x
  3. Step 3: Cross multiply
    145,789.46x = 218,753.31 × 86,741.78
  4. Step 4: Simplify right side
    145,789.46x = 18,975,051,490.29
  5. Step 5: Solve for x
    x = 18,975,051,490.29/145,789.46
  6. Step 6: Final answer
    x = 130,153.80

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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.