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Finding the Fourth Proportional to 64,939.21, 97,407.75 and 20,565.89

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Solution

The fourth proportional to 64,939.21, 97,407.75 and 20,565.89 is: 30,848.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,939.21 : 97,407.75 = 20,565.89 : x
  2. Step 2: Convert to fraction form
    64,939.21/97,407.75 = 20,565.89/x
  3. Step 3: Cross multiply
    64,939.21x = 97,407.75 × 20,565.89
  4. Step 4: Simplify right side
    64,939.21x = 2,003,277,071.65
  5. Step 5: Solve for x
    x = 2,003,277,071.65/64,939.21
  6. Step 6: Final answer
    x = 30,848.50

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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.