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Finding the Fourth Proportional to 235,981.68, 325,650.96 and 128,553

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Solution

The fourth proportional to 235,981.68, 325,650.96 and 128,553 is: 177,401.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,981.68 : 325,650.96 = 128,553 : x
  2. Step 2: Convert to fraction form
    235,981.68/325,650.96 = 128,553/x
  3. Step 3: Cross multiply
    235,981.68x = 325,650.96 × 128,553
  4. Step 4: Simplify right side
    235,981.68x = 41,863,407,860.88
  5. Step 5: Solve for x
    x = 41,863,407,860.88/235,981.68
  6. Step 6: Final answer
    x = 177,401.09

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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.