Home / 143,034.49-197,390.10-78,509.76

Finding the Fourth Proportional to 143,034.49, 197,390.10 and 78,509.76

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Solution

The fourth proportional to 143,034.49, 197,390.10 and 78,509.76 is: 108,344.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,034.49 : 197,390.10 = 78,509.76 : x
  2. Step 2: Convert to fraction form
    143,034.49/197,390.10 = 78,509.76/x
  3. Step 3: Cross multiply
    143,034.49x = 197,390.10 × 78,509.76
  4. Step 4: Simplify right side
    143,034.49x = 15,497,048,984.83
  5. Step 5: Solve for x
    x = 15,497,048,984.83/143,034.49
  6. Step 6: Final answer
    x = 108,344.84

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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.