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Finding the Fourth Proportional to 122,579, 169,046.70 and 79,513.64

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Solution

The fourth proportional to 122,579, 169,046.70 and 79,513.64 is: 109,655.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,579 : 169,046.70 = 79,513.64 : x
  2. Step 2: Convert to fraction form
    122,579/169,046.70 = 79,513.64/x
  3. Step 3: Cross multiply
    122,579x = 169,046.70 × 79,513.64
  4. Step 4: Simplify right side
    122,579x = 13,441,518,446.99
  5. Step 5: Solve for x
    x = 13,441,518,446.99/122,579
  6. Step 6: Final answer
    x = 109,655.96

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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.