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Finding the Fourth Proportional to 86,998.80, 120,058.24 and 49,280.32

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Solution

The fourth proportional to 86,998.80, 120,058.24 and 49,280.32 is: 68,006.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,998.80 : 120,058.24 = 49,280.32 : x
  2. Step 2: Convert to fraction form
    86,998.80/120,058.24 = 49,280.32/x
  3. Step 3: Cross multiply
    86,998.80x = 120,058.24 × 49,280.32
  4. Step 4: Simplify right side
    86,998.80x = 5,916,508,485.84
  5. Step 5: Solve for x
    x = 5,916,508,485.84/86,998.80
  6. Step 6: Final answer
    x = 68,006.78

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1.5x scale

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.