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Finding the Fourth Proportional to 155,961.42, 234,045.90 and 84,901.97

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Solution

The fourth proportional to 155,961.42, 234,045.90 and 84,901.97 is: 127,409.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,961.42 : 234,045.90 = 84,901.97 : x
  2. Step 2: Convert to fraction form
    155,961.42/234,045.90 = 84,901.97/x
  3. Step 3: Cross multiply
    155,961.42x = 234,045.90 × 84,901.97
  4. Step 4: Simplify right side
    155,961.42x = 19,870,956,810.19
  5. Step 5: Solve for x
    x = 19,870,956,810.19/155,961.42
  6. Step 6: Final answer
    x = 127,409.44

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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.