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Finding the Fourth Proportional to 64,690.31, 89,271.99 and 36,009.51

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Solution

The fourth proportional to 64,690.31, 89,271.99 and 36,009.51 is: 49,692.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,690.31 : 89,271.99 = 36,009.51 : x
  2. Step 2: Convert to fraction form
    64,690.31/89,271.99 = 36,009.51/x
  3. Step 3: Cross multiply
    64,690.31x = 89,271.99 × 36,009.51
  4. Step 4: Simplify right side
    64,690.31x = 3,214,640,616.62
  5. Step 5: Solve for x
    x = 3,214,640,616.62/64,690.31
  6. Step 6: Final answer
    x = 49,692.77

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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.