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Finding the Fourth Proportional to 64,780.74, 97,019.91 and 49,871.34

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Solution

The fourth proportional to 64,780.74, 97,019.91 and 49,871.34 is: 74,690.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,780.74 : 97,019.91 = 49,871.34 : x
  2. Step 2: Convert to fraction form
    64,780.74/97,019.91 = 49,871.34/x
  3. Step 3: Cross multiply
    64,780.74x = 97,019.91 × 49,871.34
  4. Step 4: Simplify right side
    64,780.74x = 4,838,512,918.38
  5. Step 5: Solve for x
    x = 4,838,512,918.38/64,780.74
  6. Step 6: Final answer
    x = 74,690.61

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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.