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Finding the Fourth Proportional to 123,153.48, 169,952.58 and 66,564.72

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Solution

The fourth proportional to 123,153.48, 169,952.58 and 66,564.72 is: 91,859.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,153.48 : 169,952.58 = 66,564.72 : x
  2. Step 2: Convert to fraction form
    123,153.48/169,952.58 = 66,564.72/x
  3. Step 3: Cross multiply
    123,153.48x = 169,952.58 × 66,564.72
  4. Step 4: Simplify right side
    123,153.48x = 11,312,845,900.98
  5. Step 5: Solve for x
    x = 11,312,845,900.98/123,153.48
  6. Step 6: Final answer
    x = 91,859.73

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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.