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Finding the Fourth Proportional to 187,143.40, 280,826.28 and 68,897.80

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Solution

The fourth proportional to 187,143.40, 280,826.28 and 68,897.80 is: 103,387.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,143.40 : 280,826.28 = 68,897.80 : x
  2. Step 2: Convert to fraction form
    187,143.40/280,826.28 = 68,897.80/x
  3. Step 3: Cross multiply
    187,143.40x = 280,826.28 × 68,897.80
  4. Step 4: Simplify right side
    187,143.40x = 19,348,312,874.18
  5. Step 5: Solve for x
    x = 19,348,312,874.18/187,143.40
  6. Step 6: Final answer
    x = 103,387.63

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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.