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Finding the Fourth Proportional to 64,979.86, 97,391.30 and 31,649.98

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Solution

The fourth proportional to 64,979.86, 97,391.30 and 31,649.98 is: 47,436.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,979.86 : 97,391.30 = 31,649.98 : x
  2. Step 2: Convert to fraction form
    64,979.86/97,391.30 = 31,649.98/x
  3. Step 3: Cross multiply
    64,979.86x = 97,391.30 × 31,649.98
  4. Step 4: Simplify right side
    64,979.86x = 3,082,432,697.17
  5. Step 5: Solve for x
    x = 3,082,432,697.17/64,979.86
  6. Step 6: Final answer
    x = 47,436.74

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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.