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Finding the Fourth Proportional to 122,297.85, 168,785.10 and 81,459.81

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Solution

The fourth proportional to 122,297.85, 168,785.10 and 81,459.81 is: 112,423.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,297.85 : 168,785.10 = 81,459.81 : x
  2. Step 2: Convert to fraction form
    122,297.85/168,785.10 = 81,459.81/x
  3. Step 3: Cross multiply
    122,297.85x = 168,785.10 × 81,459.81
  4. Step 4: Simplify right side
    122,297.85x = 13,749,202,176.83
  5. Step 5: Solve for x
    x = 13,749,202,176.83/122,297.85
  6. Step 6: Final answer
    x = 112,423.91

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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.