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Finding the Fourth Proportional to 128,218.95, 192,268.03 and 74,926.32

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Solution

The fourth proportional to 128,218.95, 192,268.03 and 74,926.32 is: 112,354.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,218.95 : 192,268.03 = 74,926.32 : x
  2. Step 2: Convert to fraction form
    128,218.95/192,268.03 = 74,926.32/x
  3. Step 3: Cross multiply
    128,218.95x = 192,268.03 × 74,926.32
  4. Step 4: Simplify right side
    128,218.95x = 14,405,935,173.72
  5. Step 5: Solve for x
    x = 14,405,935,173.72/128,218.95
  6. Step 6: Final answer
    x = 112,354.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.