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Finding the Fourth Proportional to 64,690.80, 89,272.68 and 36,010.02

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Solution

The fourth proportional to 64,690.80, 89,272.68 and 36,010.02 is: 49,693.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,690.80 : 89,272.68 = 36,010.02 : x
  2. Step 2: Convert to fraction form
    64,690.80/89,272.68 = 36,010.02/x
  3. Step 3: Cross multiply
    64,690.80x = 89,272.68 × 36,010.02
  4. Step 4: Simplify right side
    64,690.80x = 3,214,710,992.25
  5. Step 5: Solve for x
    x = 3,214,710,992.25/64,690.80
  6. Step 6: Final answer
    x = 49,693.48

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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.