Home / 78,748.62-118,114.16-28,136.79

Finding the Fourth Proportional to 78,748.62, 118,114.16 and 28,136.79

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Solution

The fourth proportional to 78,748.62, 118,114.16 and 28,136.79 is: 42,202.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,748.62 : 118,114.16 = 28,136.79 : x
  2. Step 2: Convert to fraction form
    78,748.62/118,114.16 = 28,136.79/x
  3. Step 3: Cross multiply
    78,748.62x = 118,114.16 × 28,136.79
  4. Step 4: Simplify right side
    78,748.62x = 3,323,353,175.26
  5. Step 5: Solve for x
    x = 3,323,353,175.26/78,748.62
  6. Step 6: Final answer
    x = 42,202.05

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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.