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Finding the Fourth Proportional to 128,059.08, 191,820.72 and 102,963.24

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Solution

The fourth proportional to 128,059.08, 191,820.72 and 102,963.24 is: 154,229.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,059.08 : 191,820.72 = 102,963.24 : x
  2. Step 2: Convert to fraction form
    128,059.08/191,820.72 = 102,963.24/x
  3. Step 3: Cross multiply
    128,059.08x = 191,820.72 × 102,963.24
  4. Step 4: Simplify right side
    128,059.08x = 19,750,482,830.33
  5. Step 5: Solve for x
    x = 19,750,482,830.33/128,059.08
  6. Step 6: Final answer
    x = 154,229.46

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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.