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Finding the Fourth Proportional to 78,323.96, 117,307.63 and 61,351.02

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Solution

The fourth proportional to 78,323.96, 117,307.63 and 61,351.02 is: 91,886.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,323.96 : 117,307.63 = 61,351.02 : x
  2. Step 2: Convert to fraction form
    78,323.96/117,307.63 = 61,351.02/x
  3. Step 3: Cross multiply
    78,323.96x = 117,307.63 × 61,351.02
  4. Step 4: Simplify right side
    78,323.96x = 7,196,942,754.28
  5. Step 5: Solve for x
    x = 7,196,942,754.28/78,323.96
  6. Step 6: Final answer
    x = 91,886.86

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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.