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Finding the Fourth Proportional to 91,887.88, 137,859.49 and 28,705.45

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Solution

The fourth proportional to 91,887.88, 137,859.49 and 28,705.45 is: 43,066.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,887.88 : 137,859.49 = 28,705.45 : x
  2. Step 2: Convert to fraction form
    91,887.88/137,859.49 = 28,705.45/x
  3. Step 3: Cross multiply
    91,887.88x = 137,859.49 × 28,705.45
  4. Step 4: Simplify right side
    91,887.88x = 3,957,318,697.22
  5. Step 5: Solve for x
    x = 3,957,318,697.22/91,887.88
  6. Step 6: Final answer
    x = 43,066.82

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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.