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Finding the Fourth Proportional to 78,019.52, 117,094.92 and 73,098.77

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Solution

The fourth proportional to 78,019.52, 117,094.92 and 73,098.77 is: 109,709.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,019.52 : 117,094.92 = 73,098.77 : x
  2. Step 2: Convert to fraction form
    78,019.52/117,094.92 = 73,098.77/x
  3. Step 3: Cross multiply
    78,019.52x = 117,094.92 × 73,098.77
  4. Step 4: Simplify right side
    78,019.52x = 8,559,494,625.25
  5. Step 5: Solve for x
    x = 8,559,494,625.25/78,019.52
  6. Step 6: Final answer
    x = 109,709.66

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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.