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Finding the Fourth Proportional to 122,878.42, 169,624.53 and 82,615.55

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Solution

The fourth proportional to 122,878.42, 169,624.53 and 82,615.55 is: 114,044.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,878.42 : 169,624.53 = 82,615.55 : x
  2. Step 2: Convert to fraction form
    122,878.42/169,624.53 = 82,615.55/x
  3. Step 3: Cross multiply
    122,878.42x = 169,624.53 × 82,615.55
  4. Step 4: Simplify right side
    122,878.42x = 14,013,622,991.32
  5. Step 5: Solve for x
    x = 14,013,622,991.32/122,878.42
  6. Step 6: Final answer
    x = 114,044.62

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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.