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Finding the Fourth Proportional to 56,255.80, 77,629.80 and 31,103.68

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Solution

The fourth proportional to 56,255.80, 77,629.80 and 31,103.68 is: 42,921.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,255.80 : 77,629.80 = 31,103.68 : x
  2. Step 2: Convert to fraction form
    56,255.80/77,629.80 = 31,103.68/x
  3. Step 3: Cross multiply
    56,255.80x = 77,629.80 × 31,103.68
  4. Step 4: Simplify right side
    56,255.80x = 2,414,572,457.66
  5. Step 5: Solve for x
    x = 2,414,572,457.66/56,255.80
  6. Step 6: Final answer
    x = 42,921.31

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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.