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Finding the Fourth Proportional to 56,755.71, 78,323.42 and 31,262.18

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Solution

The fourth proportional to 56,755.71, 78,323.42 and 31,262.18 is: 43,142.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,755.71 : 78,323.42 = 31,262.18 : x
  2. Step 2: Convert to fraction form
    56,755.71/78,323.42 = 31,262.18/x
  3. Step 3: Cross multiply
    56,755.71x = 78,323.42 × 31,262.18
  4. Step 4: Simplify right side
    56,755.71x = 2,448,560,854.26
  5. Step 5: Solve for x
    x = 2,448,560,854.26/56,755.71
  6. Step 6: Final answer
    x = 43,142.11

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1.5x scale

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.