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Finding the Fourth Proportional to 143,553.66, 197,898.76 and 100,980.06

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Solution

The fourth proportional to 143,553.66, 197,898.76 and 100,980.06 is: 139,208.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,553.66 : 197,898.76 = 100,980.06 : x
  2. Step 2: Convert to fraction form
    143,553.66/197,898.76 = 100,980.06/x
  3. Step 3: Cross multiply
    143,553.66x = 197,898.76 × 100,980.06
  4. Step 4: Simplify right side
    143,553.66x = 19,983,828,658.73
  5. Step 5: Solve for x
    x = 19,983,828,658.73/143,553.66
  6. Step 6: Final answer
    x = 139,208.07

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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.