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Finding the Fourth Proportional to 122,378.58, 168,567.77 and 86,506.92

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Solution

The fourth proportional to 122,378.58, 168,567.77 and 86,506.92 is: 119,157.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,378.58 : 168,567.77 = 86,506.92 : x
  2. Step 2: Convert to fraction form
    122,378.58/168,567.77 = 86,506.92/x
  3. Step 3: Cross multiply
    122,378.58x = 168,567.77 × 86,506.92
  4. Step 4: Simplify right side
    122,378.58x = 14,582,278,161.43
  5. Step 5: Solve for x
    x = 14,582,278,161.43/122,378.58
  6. Step 6: Final answer
    x = 119,157.11

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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.