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Finding the Fourth Proportional to 245,663.80, 368,299.68 and 138,981.94

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Solution

The fourth proportional to 245,663.80, 368,299.68 and 138,981.94 is: 208,362.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,663.80 : 368,299.68 = 138,981.94 : x
  2. Step 2: Convert to fraction form
    245,663.80/368,299.68 = 138,981.94/x
  3. Step 3: Cross multiply
    245,663.80x = 368,299.68 × 138,981.94
  4. Step 4: Simplify right side
    245,663.80x = 51,187,004,027.78
  5. Step 5: Solve for x
    x = 51,187,004,027.78/245,663.80
  6. Step 6: Final answer
    x = 208,362.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.