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Finding the Fourth Proportional to 159,532.35, 220,151.80 and 86,935.87

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Solution

The fourth proportional to 159,532.35, 220,151.80 and 86,935.87 is: 119,969.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,532.35 : 220,151.80 = 86,935.87 : x
  2. Step 2: Convert to fraction form
    159,532.35/220,151.80 = 86,935.87/x
  3. Step 3: Cross multiply
    159,532.35x = 220,151.80 × 86,935.87
  4. Step 4: Simplify right side
    159,532.35x = 19,139,087,830.39
  5. Step 5: Solve for x
    x = 19,139,087,830.39/159,532.35
  6. Step 6: Final answer
    x = 119,969.95

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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.