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Finding the Fourth Proportional to 122,755.40, 169,276.50 and 86,935.88

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Solution

The fourth proportional to 122,755.40, 169,276.50 and 86,935.88 is: 119,882.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,755.40 : 169,276.50 = 86,935.88 : x
  2. Step 2: Convert to fraction form
    122,755.40/169,276.50 = 86,935.88/x
  3. Step 3: Cross multiply
    122,755.40x = 169,276.50 × 86,935.88
  4. Step 4: Simplify right side
    122,755.40x = 14,716,201,490.82
  5. Step 5: Solve for x
    x = 14,716,201,490.82/122,755.40
  6. Step 6: Final answer
    x = 119,882.31

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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.