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Finding the Fourth Proportional to 122,228.16, 168,359.34 and 86,355.88

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Solution

The fourth proportional to 122,228.16, 168,359.34 and 86,355.88 is: 118,948.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,228.16 : 168,359.34 = 86,355.88 : x
  2. Step 2: Convert to fraction form
    122,228.16/168,359.34 = 86,355.88/x
  3. Step 3: Cross multiply
    122,228.16x = 168,359.34 × 86,355.88
  4. Step 4: Simplify right side
    122,228.16x = 14,538,818,961.92
  5. Step 5: Solve for x
    x = 14,538,818,961.92/122,228.16
  6. Step 6: Final answer
    x = 118,948.19

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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.