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Finding the Fourth Proportional to 56,778.88, 78,358.80 and 31,629.28

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Solution

The fourth proportional to 56,778.88, 78,358.80 and 31,629.28 is: 43,650.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,778.88 : 78,358.80 = 31,629.28 : x
  2. Step 2: Convert to fraction form
    56,778.88/78,358.80 = 31,629.28/x
  3. Step 3: Cross multiply
    56,778.88x = 78,358.80 × 31,629.28
  4. Step 4: Simplify right side
    56,778.88x = 2,478,432,425.66
  5. Step 5: Solve for x
    x = 2,478,432,425.66/56,778.88
  6. Step 6: Final answer
    x = 43,650.60

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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.