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Finding the Fourth Proportional to 287,601.40, 431,364.30 and 87,941.80

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Solution

The fourth proportional to 287,601.40, 431,364.30 and 87,941.80 is: 131,901.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,601.40 : 431,364.30 = 87,941.80 : x
  2. Step 2: Convert to fraction form
    287,601.40/431,364.30 = 87,941.80/x
  3. Step 3: Cross multiply
    287,601.40x = 431,364.30 × 87,941.80
  4. Step 4: Simplify right side
    287,601.40x = 37,934,952,997.74
  5. Step 5: Solve for x
    x = 37,934,952,997.74/287,601.40
  6. Step 6: Final answer
    x = 131,901.14

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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.