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Finding the Fourth Proportional to 78,691, 108,593.58 and 43,363

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Solution

The fourth proportional to 78,691, 108,593.58 and 43,363 is: 59,840.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,691 : 108,593.58 = 43,363 : x
  2. Step 2: Convert to fraction form
    78,691/108,593.58 = 43,363/x
  3. Step 3: Cross multiply
    78,691x = 108,593.58 × 43,363
  4. Step 4: Simplify right side
    78,691x = 4,708,943,409.54
  5. Step 5: Solve for x
    x = 4,708,943,409.54/78,691
  6. Step 6: Final answer
    x = 59,840.94

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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.