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Finding the Fourth Proportional to 135,819.30, 187,410.64 and 75,390.40

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Solution

The fourth proportional to 135,819.30, 187,410.64 and 75,390.40 is: 104,027.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,819.30 : 187,410.64 = 75,390.40 : x
  2. Step 2: Convert to fraction form
    135,819.30/187,410.64 = 75,390.40/x
  3. Step 3: Cross multiply
    135,819.30x = 187,410.64 × 75,390.40
  4. Step 4: Simplify right side
    135,819.30x = 14,128,963,113.86
  5. Step 5: Solve for x
    x = 14,128,963,113.86/135,819.30
  6. Step 6: Final answer
    x = 104,027.65

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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.