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Finding the Fourth Proportional to 139,136.60, 208,721.53 and 49,160.69

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Solution

The fourth proportional to 139,136.60, 208,721.53 and 49,160.69 is: 73,746.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,136.60 : 208,721.53 = 49,160.69 : x
  2. Step 2: Convert to fraction form
    139,136.60/208,721.53 = 49,160.69/x
  3. Step 3: Cross multiply
    139,136.60x = 208,721.53 × 49,160.69
  4. Step 4: Simplify right side
    139,136.60x = 10,260,894,233.20
  5. Step 5: Solve for x
    x = 10,260,894,233.20/139,136.60
  6. Step 6: Final answer
    x = 73,746.91

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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.