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Finding the Fourth Proportional to 61,309.80, 91,943.10 and 28,045.80

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Solution

The fourth proportional to 61,309.80, 91,943.10 and 28,045.80 is: 42,058.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,309.80 : 91,943.10 = 28,045.80 : x
  2. Step 2: Convert to fraction form
    61,309.80/91,943.10 = 28,045.80/x
  3. Step 3: Cross multiply
    61,309.80x = 91,943.10 × 28,045.80
  4. Step 4: Simplify right side
    61,309.80x = 2,578,617,793.98
  5. Step 5: Solve for x
    x = 2,578,617,793.98/61,309.80
  6. Step 6: Final answer
    x = 42,058.82

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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.