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Finding the Fourth Proportional to 69,864.50, 96,420.30 and 39,657.98

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Solution

The fourth proportional to 69,864.50, 96,420.30 and 39,657.98 is: 54,732.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,864.50 : 96,420.30 = 39,657.98 : x
  2. Step 2: Convert to fraction form
    69,864.50/96,420.30 = 39,657.98/x
  3. Step 3: Cross multiply
    69,864.50x = 96,420.30 × 39,657.98
  4. Step 4: Simplify right side
    69,864.50x = 3,823,834,328.99
  5. Step 5: Solve for x
    x = 3,823,834,328.99/69,864.50
  6. Step 6: Final answer
    x = 54,732.15

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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.