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Finding the Fourth Proportional to 78,956.73, 118,323.13 and 61,104.28

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Solution

The fourth proportional to 78,956.73, 118,323.13 and 61,104.28 is: 91,569.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,956.73 : 118,323.13 = 61,104.28 : x
  2. Step 2: Convert to fraction form
    78,956.73/118,323.13 = 61,104.28/x
  3. Step 3: Cross multiply
    78,956.73x = 118,323.13 × 61,104.28
  4. Step 4: Simplify right side
    78,956.73x = 7,230,049,666.00
  5. Step 5: Solve for x
    x = 7,230,049,666.00/78,956.73
  6. Step 6: Final answer
    x = 91,569.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.