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Finding the Fourth Proportional to 143,347.17, 197,830.13 and 79,689.09

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Solution

The fourth proportional to 143,347.17, 197,830.13 and 79,689.09 is: 109,977.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,347.17 : 197,830.13 = 79,689.09 : x
  2. Step 2: Convert to fraction form
    143,347.17/197,830.13 = 79,689.09/x
  3. Step 3: Cross multiply
    143,347.17x = 197,830.13 × 79,689.09
  4. Step 4: Simplify right side
    143,347.17x = 15,764,902,635.84
  5. Step 5: Solve for x
    x = 15,764,902,635.84/143,347.17
  6. Step 6: Final answer
    x = 109,977.08

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1.5x scale

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.