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Finding the Fourth Proportional to 128,017.74, 191,967.16 and 74,725.11

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Solution

The fourth proportional to 128,017.74, 191,967.16 and 74,725.11 is: 112,052.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,017.74 : 191,967.16 = 74,725.11 : x
  2. Step 2: Convert to fraction form
    128,017.74/191,967.16 = 74,725.11/x
  3. Step 3: Cross multiply
    128,017.74x = 191,967.16 × 74,725.11
  4. Step 4: Simplify right side
    128,017.74x = 14,344,767,147.39
  5. Step 5: Solve for x
    x = 14,344,767,147.39/128,017.74
  6. Step 6: Final answer
    x = 112,052.96

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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.