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Finding the Fourth Proportional to 85,834.48, 128,543.76 and 43,603.44

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Solution

The fourth proportional to 85,834.48, 128,543.76 and 43,603.44 is: 65,299.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,834.48 : 128,543.76 = 43,603.44 : x
  2. Step 2: Convert to fraction form
    85,834.48/128,543.76 = 43,603.44/x
  3. Step 3: Cross multiply
    85,834.48x = 128,543.76 × 43,603.44
  4. Step 4: Simplify right side
    85,834.48x = 5,604,950,126.53
  5. Step 5: Solve for x
    x = 5,604,950,126.53/85,834.48
  6. Step 6: Final answer
    x = 65,299.52

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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.