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Finding the Fourth Proportional to 56,875.72, 85,365.93 and 28,815.29

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Solution

The fourth proportional to 56,875.72, 85,365.93 and 28,815.29 is: 43,249.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,875.72 : 85,365.93 = 28,815.29 : x
  2. Step 2: Convert to fraction form
    56,875.72/85,365.93 = 28,815.29/x
  3. Step 3: Cross multiply
    56,875.72x = 85,365.93 × 28,815.29
  4. Step 4: Simplify right side
    56,875.72x = 2,459,844,029.07
  5. Step 5: Solve for x
    x = 2,459,844,029.07/56,875.72
  6. Step 6: Final answer
    x = 43,249.46

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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.