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Finding the Fourth Proportional to 143,307.63, 197,772.71 and 79,649.46

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Solution

The fourth proportional to 143,307.63, 197,772.71 and 79,649.46 is: 109,920.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,307.63 : 197,772.71 = 79,649.46 : x
  2. Step 2: Convert to fraction form
    143,307.63/197,772.71 = 79,649.46/x
  3. Step 3: Cross multiply
    143,307.63x = 197,772.71 × 79,649.46
  4. Step 4: Simplify right side
    143,307.63x = 15,752,489,155.99
  5. Step 5: Solve for x
    x = 15,752,489,155.99/143,307.63
  6. Step 6: Final answer
    x = 109,920.80

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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.