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Finding the Fourth Proportional to 101,087.80, 139,528.92 and 58,660

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Solution

The fourth proportional to 101,087.80, 139,528.92 and 58,660 is: 80,966.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,087.80 : 139,528.92 = 58,660 : x
  2. Step 2: Convert to fraction form
    101,087.80/139,528.92 = 58,660/x
  3. Step 3: Cross multiply
    101,087.80x = 139,528.92 × 58,660
  4. Step 4: Simplify right side
    101,087.80x = 8,184,766,447.20
  5. Step 5: Solve for x
    x = 8,184,766,447.20/101,087.80
  6. Step 6: Final answer
    x = 80,966.91

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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.