Home / 78,748.43-118,114.01-28,136.66

Finding the Fourth Proportional to 78,748.43, 118,114.01 and 28,136.66

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Solution

The fourth proportional to 78,748.43, 118,114.01 and 28,136.66 is: 42,201.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,748.43 : 118,114.01 = 28,136.66 : x
  2. Step 2: Convert to fraction form
    78,748.43/118,114.01 = 28,136.66/x
  3. Step 3: Cross multiply
    78,748.43x = 118,114.01 × 28,136.66
  4. Step 4: Simplify right side
    78,748.43x = 3,323,333,599.92
  5. Step 5: Solve for x
    x = 3,323,333,599.92/78,748.43
  6. Step 6: Final answer
    x = 42,201.90

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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.