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Finding the Fourth Proportional to 87,692.92, 120,987.66 and 53,665.90

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Solution

The fourth proportional to 87,692.92, 120,987.66 and 53,665.90 is: 74,041.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,692.92 : 120,987.66 = 53,665.90 : x
  2. Step 2: Convert to fraction form
    87,692.92/120,987.66 = 53,665.90/x
  3. Step 3: Cross multiply
    87,692.92x = 120,987.66 × 53,665.90
  4. Step 4: Simplify right side
    87,692.92x = 6,492,911,662.79
  5. Step 5: Solve for x
    x = 6,492,911,662.79/87,692.92
  6. Step 6: Final answer
    x = 74,041.46

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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.