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Finding the Fourth Proportional to 123,178.41, 169,986.47 and 66,590.01

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Solution

The fourth proportional to 123,178.41, 169,986.47 and 66,590.01 is: 91,894.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,178.41 : 169,986.47 = 66,590.01 : x
  2. Step 2: Convert to fraction form
    123,178.41/169,986.47 = 66,590.01/x
  3. Step 3: Cross multiply
    123,178.41x = 169,986.47 × 66,590.01
  4. Step 4: Simplify right side
    123,178.41x = 11,319,400,404.21
  5. Step 5: Solve for x
    x = 11,319,400,404.21/123,178.41
  6. Step 6: Final answer
    x = 91,894.35

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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.