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Finding the Fourth Proportional to 122,218.92, 168,485.49 and 85,809.51

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Solution

The fourth proportional to 122,218.92, 168,485.49 and 85,809.51 is: 118,293.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,218.92 : 168,485.49 = 85,809.51 : x
  2. Step 2: Convert to fraction form
    122,218.92/168,485.49 = 85,809.51/x
  3. Step 3: Cross multiply
    122,218.92x = 168,485.49 × 85,809.51
  4. Step 4: Simplify right side
    122,218.92x = 14,457,657,339.01
  5. Step 5: Solve for x
    x = 14,457,657,339.01/122,218.92
  6. Step 6: Final answer
    x = 118,293.12

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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.