Home / 143,101.12-197,478.08-79,437.28

Finding the Fourth Proportional to 143,101.12, 197,478.08 and 79,437.28

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Solution

The fourth proportional to 143,101.12, 197,478.08 and 79,437.28 is: 109,622.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,101.12 : 197,478.08 = 79,437.28 : x
  2. Step 2: Convert to fraction form
    143,101.12/197,478.08 = 79,437.28/x
  3. Step 3: Cross multiply
    143,101.12x = 197,478.08 × 79,437.28
  4. Step 4: Simplify right side
    143,101.12x = 15,687,121,534.82
  5. Step 5: Solve for x
    x = 15,687,121,534.82/143,101.12
  6. Step 6: Final answer
    x = 109,622.63

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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.