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Finding the Fourth Proportional to 251,869.20, 377,803.80 and 85,657.20

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Solution

The fourth proportional to 251,869.20, 377,803.80 and 85,657.20 is: 128,485.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,869.20 : 377,803.80 = 85,657.20 : x
  2. Step 2: Convert to fraction form
    251,869.20/377,803.80 = 85,657.20/x
  3. Step 3: Cross multiply
    251,869.20x = 377,803.80 × 85,657.20
  4. Step 4: Simplify right side
    251,869.20x = 32,361,615,657.36
  5. Step 5: Solve for x
    x = 32,361,615,657.36/251,869.20
  6. Step 6: Final answer
    x = 128,485.80

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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.