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Finding the Fourth Proportional to 64,890.44, 97,288.93 and 39,878.82

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Solution

The fourth proportional to 64,890.44, 97,288.93 and 39,878.82 is: 59,789.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,890.44 : 97,288.93 = 39,878.82 : x
  2. Step 2: Convert to fraction form
    64,890.44/97,288.93 = 39,878.82/x
  3. Step 3: Cross multiply
    64,890.44x = 97,288.93 × 39,878.82
  4. Step 4: Simplify right side
    64,890.44x = 3,879,767,727.46
  5. Step 5: Solve for x
    x = 3,879,767,727.46/64,890.44
  6. Step 6: Final answer
    x = 59,789.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.