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Finding the Fourth Proportional to 78,544.80, 108,393.12 and 42,736.32

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Solution

The fourth proportional to 78,544.80, 108,393.12 and 42,736.32 is: 58,976.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,544.80 : 108,393.12 = 42,736.32 : x
  2. Step 2: Convert to fraction form
    78,544.80/108,393.12 = 42,736.32/x
  3. Step 3: Cross multiply
    78,544.80x = 108,393.12 × 42,736.32
  4. Step 4: Simplify right side
    78,544.80x = 4,632,323,062.12
  5. Step 5: Solve for x
    x = 4,632,323,062.12/78,544.80
  6. Step 6: Final answer
    x = 58,976.83

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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.