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Finding the Fourth Proportional to 56,754.63, 78,320.67 and 31,260.48

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Solution

The fourth proportional to 56,754.63, 78,320.67 and 31,260.48 is: 43,139.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,754.63 : 78,320.67 = 31,260.48 : x
  2. Step 2: Convert to fraction form
    56,754.63/78,320.67 = 31,260.48/x
  3. Step 3: Cross multiply
    56,754.63x = 78,320.67 × 31,260.48
  4. Step 4: Simplify right side
    56,754.63x = 2,448,341,738.12
  5. Step 5: Solve for x
    x = 2,448,341,738.12/56,754.63
  6. Step 6: Final answer
    x = 43,139.07

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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.