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Finding the Fourth Proportional to 128,889.90, 193,334.85 and 128,889.90

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Solution

The fourth proportional to 128,889.90, 193,334.85 and 128,889.90 is: 193,334.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,889.90 : 193,334.85 = 128,889.90 : x
  2. Step 2: Convert to fraction form
    128,889.90/193,334.85 = 128,889.90/x
  3. Step 3: Cross multiply
    128,889.90x = 193,334.85 × 128,889.90
  4. Step 4: Simplify right side
    128,889.90x = 24,918,909,483.02
  5. Step 5: Solve for x
    x = 24,918,909,483.02/128,889.90
  6. Step 6: Final answer
    x = 193,334.85

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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.