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Finding the Fourth Proportional to 128,473.74, 192,709.54 and 100,417.37

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Solution

The fourth proportional to 128,473.74, 192,709.54 and 100,417.37 is: 150,625.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,473.74 : 192,709.54 = 100,417.37 : x
  2. Step 2: Convert to fraction form
    128,473.74/192,709.54 = 100,417.37/x
  3. Step 3: Cross multiply
    128,473.74x = 192,709.54 × 100,417.37
  4. Step 4: Simplify right side
    128,473.74x = 19,351,385,180.71
  5. Step 5: Solve for x
    x = 19,351,385,180.71/128,473.74
  6. Step 6: Final answer
    x = 150,625.22

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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.