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Finding the Fourth Proportional to 56,502.92, 78,003.06 and 39,810.44

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Solution

The fourth proportional to 56,502.92, 78,003.06 and 39,810.44 is: 54,958.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,502.92 : 78,003.06 = 39,810.44 : x
  2. Step 2: Convert to fraction form
    56,502.92/78,003.06 = 39,810.44/x
  3. Step 3: Cross multiply
    56,502.92x = 78,003.06 × 39,810.44
  4. Step 4: Simplify right side
    56,502.92x = 3,105,336,139.95
  5. Step 5: Solve for x
    x = 3,105,336,139.95/56,502.92
  6. Step 6: Final answer
    x = 54,958.86

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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.