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Finding the Fourth Proportional to 78,607, 108,477 and 42,796.92

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Solution

The fourth proportional to 78,607, 108,477 and 42,796.92 is: 59,059.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,607 : 108,477 = 42,796.92 : x
  2. Step 2: Convert to fraction form
    78,607/108,477 = 42,796.92/x
  3. Step 3: Cross multiply
    78,607x = 108,477 × 42,796.92
  4. Step 4: Simplify right side
    78,607x = 4,642,481,490.84
  5. Step 5: Solve for x
    x = 4,642,481,490.84/78,607
  6. Step 6: Final answer
    x = 59,059.39

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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.