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Finding the Fourth Proportional to 78,729.11, 108,642.24 and 44,733.11

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Solution

The fourth proportional to 78,729.11, 108,642.24 and 44,733.11 is: 61,729.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,729.11 : 108,642.24 = 44,733.11 : x
  2. Step 2: Convert to fraction form
    78,729.11/108,642.24 = 44,733.11/x
  3. Step 3: Cross multiply
    78,729.11x = 108,642.24 × 44,733.11
  4. Step 4: Simplify right side
    78,729.11x = 4,859,904,729.36
  5. Step 5: Solve for x
    x = 4,859,904,729.36/78,729.11
  6. Step 6: Final answer
    x = 61,729.45

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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.