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Finding the Fourth Proportional to 64,868.60, 89,516.63 and 38,028.98

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Solution

The fourth proportional to 64,868.60, 89,516.63 and 38,028.98 is: 52,478.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,868.60 : 89,516.63 = 38,028.98 : x
  2. Step 2: Convert to fraction form
    64,868.60/89,516.63 = 38,028.98/x
  3. Step 3: Cross multiply
    64,868.60x = 89,516.63 × 38,028.98
  4. Step 4: Simplify right side
    64,868.60x = 3,404,226,450.80
  5. Step 5: Solve for x
    x = 3,404,226,450.80/64,868.60
  6. Step 6: Final answer
    x = 52,478.80

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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.