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Finding the Fourth Proportional to 64,987.96, 89,679.10 and 37,761.64

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Solution

The fourth proportional to 64,987.96, 89,679.10 and 37,761.64 is: 52,108.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,987.96 : 89,679.10 = 37,761.64 : x
  2. Step 2: Convert to fraction form
    64,987.96/89,679.10 = 37,761.64/x
  3. Step 3: Cross multiply
    64,987.96x = 89,679.10 × 37,761.64
  4. Step 4: Simplify right side
    64,987.96x = 3,386,429,889.72
  5. Step 5: Solve for x
    x = 3,386,429,889.72/64,987.96
  6. Step 6: Final answer
    x = 52,108.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.