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Finding the Fourth Proportional to 70,976.61, 106,446.74 and 21,045.03

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Solution

The fourth proportional to 70,976.61, 106,446.74 and 21,045.03 is: 31,562.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,976.61 : 106,446.74 = 21,045.03 : x
  2. Step 2: Convert to fraction form
    70,976.61/106,446.74 = 21,045.03/x
  3. Step 3: Cross multiply
    70,976.61x = 106,446.74 × 21,045.03
  4. Step 4: Simplify right side
    70,976.61x = 2,240,174,731.48
  5. Step 5: Solve for x
    x = 2,240,174,731.48/70,976.61
  6. Step 6: Final answer
    x = 31,562.15

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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.