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Finding the Fourth Proportional to 287,950.60, 431,921.85 and 130,178.80

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Solution

The fourth proportional to 287,950.60, 431,921.85 and 130,178.80 is: 195,266.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,950.60 : 431,921.85 = 130,178.80 : x
  2. Step 2: Convert to fraction form
    287,950.60/431,921.85 = 130,178.80/x
  3. Step 3: Cross multiply
    287,950.60x = 431,921.85 × 130,178.80
  4. Step 4: Simplify right side
    287,950.60x = 56,227,068,126.78
  5. Step 5: Solve for x
    x = 56,227,068,126.78/287,950.60
  6. Step 6: Final answer
    x = 195,266.37

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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.