Home / 78,390.02-108,136.75-49,658.99

Finding the Fourth Proportional to 78,390.02, 108,136.75 and 49,658.99

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Solution

The fourth proportional to 78,390.02, 108,136.75 and 49,658.99 is: 68,503.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,390.02 : 108,136.75 = 49,658.99 : x
  2. Step 2: Convert to fraction form
    78,390.02/108,136.75 = 49,658.99/x
  3. Step 3: Cross multiply
    78,390.02x = 108,136.75 × 49,658.99
  4. Step 4: Simplify right side
    78,390.02x = 5,369,961,370.35
  5. Step 5: Solve for x
    x = 5,369,961,370.35/78,390.02
  6. Step 6: Final answer
    x = 68,503.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.