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Finding the Fourth Proportional to 287,850.60, 431,775.90 and 100,837.80

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Solution

The fourth proportional to 287,850.60, 431,775.90 and 100,837.80 is: 151,256.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,850.60 : 431,775.90 = 100,837.80 : x
  2. Step 2: Convert to fraction form
    287,850.60/431,775.90 = 100,837.80/x
  3. Step 3: Cross multiply
    287,850.60x = 431,775.90 × 100,837.80
  4. Step 4: Simplify right side
    287,850.60x = 43,539,331,849.02
  5. Step 5: Solve for x
    x = 43,539,331,849.02/287,850.60
  6. Step 6: Final answer
    x = 151,256.70

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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.