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Finding the Fourth Proportional to 58,391, 80,579.90 and 31,895

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Solution

The fourth proportional to 58,391, 80,579.90 and 31,895 is: 44,015.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,391 : 80,579.90 = 31,895 : x
  2. Step 2: Convert to fraction form
    58,391/80,579.90 = 31,895/x
  3. Step 3: Cross multiply
    58,391x = 80,579.90 × 31,895
  4. Step 4: Simplify right side
    58,391x = 2,570,095,910.50
  5. Step 5: Solve for x
    x = 2,570,095,910.50/58,391
  6. Step 6: Final answer
    x = 44,015.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.