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Finding the Fourth Proportional to 78,425.72, 108,231.64 and 44,440.80

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Solution

The fourth proportional to 78,425.72, 108,231.64 and 44,440.80 is: 61,330.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,425.72 : 108,231.64 = 44,440.80 : x
  2. Step 2: Convert to fraction form
    78,425.72/108,231.64 = 44,440.80/x
  3. Step 3: Cross multiply
    78,425.72x = 108,231.64 × 44,440.80
  4. Step 4: Simplify right side
    78,425.72x = 4,809,901,008.72
  5. Step 5: Solve for x
    x = 4,809,901,008.72/78,425.72
  6. Step 6: Final answer
    x = 61,330.66

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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.