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Finding the Fourth Proportional to 123,179.16, 169,986.72 and 66,590.40

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Solution

The fourth proportional to 123,179.16, 169,986.72 and 66,590.40 is: 91,894.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,179.16 : 169,986.72 = 66,590.40 : x
  2. Step 2: Convert to fraction form
    123,179.16/169,986.72 = 66,590.40/x
  3. Step 3: Cross multiply
    123,179.16x = 169,986.72 × 66,590.40
  4. Step 4: Simplify right side
    123,179.16x = 11,319,483,679.49
  5. Step 5: Solve for x
    x = 11,319,483,679.49/123,179.16
  6. Step 6: Final answer
    x = 91,894.47

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1.5x scale

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.