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Finding the Fourth Proportional to 285,741.56, 428,473.80 and 86,024.72

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Solution

The fourth proportional to 285,741.56, 428,473.80 and 86,024.72 is: 128,995.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,741.56 : 428,473.80 = 86,024.72 : x
  2. Step 2: Convert to fraction form
    285,741.56/428,473.80 = 86,024.72/x
  3. Step 3: Cross multiply
    285,741.56x = 428,473.80 × 86,024.72
  4. Step 4: Simplify right side
    285,741.56x = 36,859,338,672.34
  5. Step 5: Solve for x
    x = 36,859,338,672.34/285,741.56
  6. Step 6: Final answer
    x = 128,995.37

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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.