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Finding the Fourth Proportional to 144,136.80, 216,205.20 and 45,640.80

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Solution

The fourth proportional to 144,136.80, 216,205.20 and 45,640.80 is: 68,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,136.80 : 216,205.20 = 45,640.80 : x
  2. Step 2: Convert to fraction form
    144,136.80/216,205.20 = 45,640.80/x
  3. Step 3: Cross multiply
    144,136.80x = 216,205.20 × 45,640.80
  4. Step 4: Simplify right side
    144,136.80x = 9,867,778,292.16
  5. Step 5: Solve for x
    x = 9,867,778,292.16/144,136.80
  6. Step 6: Final answer
    x = 68,461.20

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1.5x scale

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.