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Finding the Fourth Proportional to 122,356.82, 168,823.50 and 71,338.88

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Solution

The fourth proportional to 122,356.82, 168,823.50 and 71,338.88 is: 98,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,356.82 : 168,823.50 = 71,338.88 : x
  2. Step 2: Convert to fraction form
    122,356.82/168,823.50 = 71,338.88/x
  3. Step 3: Cross multiply
    122,356.82x = 168,823.50 × 71,338.88
  4. Step 4: Simplify right side
    122,356.82x = 12,043,679,407.68
  5. Step 5: Solve for x
    x = 12,043,679,407.68/122,356.82
  6. Step 6: Final answer
    x = 98,430.80

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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.