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Finding the Fourth Proportional to 122,019.61, 168,390.58 and 68,304.31

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Solution

The fourth proportional to 122,019.61, 168,390.58 and 68,304.31 is: 94,261.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,019.61 : 168,390.58 = 68,304.31 : x
  2. Step 2: Convert to fraction form
    122,019.61/168,390.58 = 68,304.31/x
  3. Step 3: Cross multiply
    122,019.61x = 168,390.58 × 68,304.31
  4. Step 4: Simplify right side
    122,019.61x = 11,501,801,535.45
  5. Step 5: Solve for x
    x = 11,501,801,535.45/122,019.61
  6. Step 6: Final answer
    x = 94,261.91

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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.