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Finding the Fourth Proportional to 128,978.24, 193,468.32 and 35,489.12

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Solution

The fourth proportional to 128,978.24, 193,468.32 and 35,489.12 is: 53,233.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,978.24 : 193,468.32 = 35,489.12 : x
  2. Step 2: Convert to fraction form
    128,978.24/193,468.32 = 35,489.12/x
  3. Step 3: Cross multiply
    128,978.24x = 193,468.32 × 35,489.12
  4. Step 4: Simplify right side
    128,978.24x = 6,866,020,424.68
  5. Step 5: Solve for x
    x = 6,866,020,424.68/128,978.24
  6. Step 6: Final answer
    x = 53,233.94

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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.