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Finding the Fourth Proportional to 64,122.80, 96,038.40 and 40,503.20

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Solution

The fourth proportional to 64,122.80, 96,038.40 and 40,503.20 is: 60,662.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,122.80 : 96,038.40 = 40,503.20 : x
  2. Step 2: Convert to fraction form
    64,122.80/96,038.40 = 40,503.20/x
  3. Step 3: Cross multiply
    64,122.80x = 96,038.40 × 40,503.20
  4. Step 4: Simplify right side
    64,122.80x = 3,889,862,522.88
  5. Step 5: Solve for x
    x = 3,889,862,522.88/64,122.80
  6. Step 6: Final answer
    x = 60,662.71

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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.