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Finding the Fourth Proportional to 78,756, 118,168.80 and 41,307.12

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Solution

The fourth proportional to 78,756, 118,168.80 and 41,307.12 is: 61,978.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,756 : 118,168.80 = 41,307.12 : x
  2. Step 2: Convert to fraction form
    78,756/118,168.80 = 41,307.12/x
  3. Step 3: Cross multiply
    78,756x = 118,168.80 × 41,307.12
  4. Step 4: Simplify right side
    78,756x = 4,881,212,801.86
  5. Step 5: Solve for x
    x = 4,881,212,801.86/78,756
  6. Step 6: Final answer
    x = 61,978.93

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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.