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Finding the Fourth Proportional to 78,798.71, 108,728.61 and 44,338.64

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Solution

The fourth proportional to 78,798.71, 108,728.61 and 44,338.64 is: 61,179.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,798.71 : 108,728.61 = 44,338.64 : x
  2. Step 2: Convert to fraction form
    78,798.71/108,728.61 = 44,338.64/x
  3. Step 3: Cross multiply
    78,798.71x = 108,728.61 × 44,338.64
  4. Step 4: Simplify right side
    78,798.71x = 4,820,878,152.85
  5. Step 5: Solve for x
    x = 4,820,878,152.85/78,798.71
  6. Step 6: Final answer
    x = 61,179.66

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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.