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Finding the Fourth Proportional to 288,078.60, 431,750.70 and 161,718.60

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Solution

The fourth proportional to 288,078.60, 431,750.70 and 161,718.60 is: 242,371.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,078.60 : 431,750.70 = 161,718.60 : x
  2. Step 2: Convert to fraction form
    288,078.60/431,750.70 = 161,718.60/x
  3. Step 3: Cross multiply
    288,078.60x = 431,750.70 × 161,718.60
  4. Step 4: Simplify right side
    288,078.60x = 69,822,118,753.02
  5. Step 5: Solve for x
    x = 69,822,118,753.02/288,078.60
  6. Step 6: Final answer
    x = 242,371.77

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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.