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Finding the Fourth Proportional to 235,919.61, 325,572.76 and 128,489.55

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Solution

The fourth proportional to 235,919.61, 325,572.76 and 128,489.55 is: 177,317.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,919.61 : 325,572.76 = 128,489.55 : x
  2. Step 2: Convert to fraction form
    235,919.61/325,572.76 = 128,489.55/x
  3. Step 3: Cross multiply
    235,919.61x = 325,572.76 × 128,489.55
  4. Step 4: Simplify right side
    235,919.61x = 41,832,697,103.43
  5. Step 5: Solve for x
    x = 41,832,697,103.43/235,919.61
  6. Step 6: Final answer
    x = 177,317.59

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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.