Home / 143,140.52-197,543.05-79,478.31

Finding the Fourth Proportional to 143,140.52, 197,543.05 and 79,478.31

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Solution

The fourth proportional to 143,140.52, 197,543.05 and 79,478.31 is: 109,685.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,140.52 : 197,543.05 = 79,478.31 : x
  2. Step 2: Convert to fraction form
    143,140.52/197,543.05 = 79,478.31/x
  3. Step 3: Cross multiply
    143,140.52x = 197,543.05 × 79,478.31
  4. Step 4: Simplify right side
    143,140.52x = 15,700,388,755.40
  5. Step 5: Solve for x
    x = 15,700,388,755.40/143,140.52
  6. Step 6: Final answer
    x = 109,685.15

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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.