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Finding the Fourth Proportional to 122,052.57, 168,364.89 and 85,809.48

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Solution

The fourth proportional to 122,052.57, 168,364.89 and 85,809.48 is: 118,369.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,052.57 : 168,364.89 = 85,809.48 : x
  2. Step 2: Convert to fraction form
    122,052.57/168,364.89 = 85,809.48/x
  3. Step 3: Cross multiply
    122,052.57x = 168,364.89 × 85,809.48
  4. Step 4: Simplify right side
    122,052.57x = 14,447,303,661.16
  5. Step 5: Solve for x
    x = 14,447,303,661.16/122,052.57
  6. Step 6: Final answer
    x = 118,369.52

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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.