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Finding the Fourth Proportional to 175,289.92, 262,943.60 and 85,415.20

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Solution

The fourth proportional to 175,289.92, 262,943.60 and 85,415.20 is: 128,127.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    175,289.92 : 262,943.60 = 85,415.20 : x
  2. Step 2: Convert to fraction form
    175,289.92/262,943.60 = 85,415.20/x
  3. Step 3: Cross multiply
    175,289.92x = 262,943.60 × 85,415.20
  4. Step 4: Simplify right side
    175,289.92x = 22,459,380,182.72
  5. Step 5: Solve for x
    x = 22,459,380,182.72/175,289.92
  6. Step 6: Final answer
    x = 128,127.05

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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.