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Finding the Fourth Proportional to 128,494.32, 192,740.34 and 100,437.96

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Solution

The fourth proportional to 128,494.32, 192,740.34 and 100,437.96 is: 150,656.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,494.32 : 192,740.34 = 100,437.96 : x
  2. Step 2: Convert to fraction form
    128,494.32/192,740.34 = 100,437.96/x
  3. Step 3: Cross multiply
    128,494.32x = 192,740.34 × 100,437.96
  4. Step 4: Simplify right side
    128,494.32x = 19,358,446,559.31
  5. Step 5: Solve for x
    x = 19,358,446,559.31/128,494.32
  6. Step 6: Final answer
    x = 150,656.05

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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.