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Finding the Fourth Proportional to 61,448.88, 84,811.64 and 39,908.56

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Solution

The fourth proportional to 61,448.88, 84,811.64 and 39,908.56 is: 55,081.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,448.88 : 84,811.64 = 39,908.56 : x
  2. Step 2: Convert to fraction form
    61,448.88/84,811.64 = 39,908.56/x
  3. Step 3: Cross multiply
    61,448.88x = 84,811.64 × 39,908.56
  4. Step 4: Simplify right side
    61,448.88x = 3,384,710,423.64
  5. Step 5: Solve for x
    x = 3,384,710,423.64/61,448.88
  6. Step 6: Final answer
    x = 55,081.73

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1.5x scale

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.