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Finding the Fourth Proportional to 64,837.92, 89,431.92 and 39,699.84

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Solution

The fourth proportional to 64,837.92, 89,431.92 and 39,699.84 is: 54,758.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,837.92 : 89,431.92 = 39,699.84 : x
  2. Step 2: Convert to fraction form
    64,837.92/89,431.92 = 39,699.84/x
  3. Step 3: Cross multiply
    64,837.92x = 89,431.92 × 39,699.84
  4. Step 4: Simplify right side
    64,837.92x = 3,550,432,914.89
  5. Step 5: Solve for x
    x = 3,550,432,914.89/64,837.92
  6. Step 6: Final answer
    x = 54,758.59

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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.