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Finding the Fourth Proportional to 78,737.15, 118,071.09 and 28,804.30

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Solution

The fourth proportional to 78,737.15, 118,071.09 and 28,804.30 is: 43,193.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,737.15 : 118,071.09 = 28,804.30 : x
  2. Step 2: Convert to fraction form
    78,737.15/118,071.09 = 28,804.30/x
  3. Step 3: Cross multiply
    78,737.15x = 118,071.09 × 28,804.30
  4. Step 4: Simplify right side
    78,737.15x = 3,400,955,097.69
  5. Step 5: Solve for x
    x = 3,400,955,097.69/78,737.15
  6. Step 6: Final answer
    x = 43,193.78

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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.