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Finding the Fourth Proportional to 56,428.67, 84,788.31 and 42,519.86

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Solution

The fourth proportional to 56,428.67, 84,788.31 and 42,519.86 is: 63,889.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,428.67 : 84,788.31 = 42,519.86 : x
  2. Step 2: Convert to fraction form
    56,428.67/84,788.31 = 42,519.86/x
  3. Step 3: Cross multiply
    56,428.67x = 84,788.31 × 42,519.86
  4. Step 4: Simplify right side
    56,428.67x = 3,605,186,646.90
  5. Step 5: Solve for x
    x = 3,605,186,646.90/56,428.67
  6. Step 6: Final answer
    x = 63,889.28

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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.