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Finding the Fourth Proportional to 78,547.73, 108,393.73 and 42,736.97

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Solution

The fourth proportional to 78,547.73, 108,393.73 and 42,736.97 is: 58,975.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,547.73 : 108,393.73 = 42,736.97 : x
  2. Step 2: Convert to fraction form
    78,547.73/108,393.73 = 42,736.97/x
  3. Step 3: Cross multiply
    78,547.73x = 108,393.73 × 42,736.97
  4. Step 4: Simplify right side
    78,547.73x = 4,632,419,751.34
  5. Step 5: Solve for x
    x = 4,632,419,751.34/78,547.73
  6. Step 6: Final answer
    x = 58,975.86

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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.