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Finding the Fourth Proportional to 61,053.40, 84,257.58 and 39,889.72

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Solution

The fourth proportional to 61,053.40, 84,257.58 and 39,889.72 is: 55,050.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,053.40 : 84,257.58 = 39,889.72 : x
  2. Step 2: Convert to fraction form
    61,053.40/84,257.58 = 39,889.72/x
  3. Step 3: Cross multiply
    61,053.40x = 84,257.58 × 39,889.72
  4. Step 4: Simplify right side
    61,053.40x = 3,361,011,274.08
  5. Step 5: Solve for x
    x = 3,361,011,274.08/61,053.40
  6. Step 6: Final answer
    x = 55,050.35

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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.