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Finding the Fourth Proportional to 77,682.98, 107,220.21 and 54,998.39

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Solution

The fourth proportional to 77,682.98, 107,220.21 and 54,998.39 is: 75,910.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,682.98 : 107,220.21 = 54,998.39 : x
  2. Step 2: Convert to fraction form
    77,682.98/107,220.21 = 54,998.39/x
  3. Step 3: Cross multiply
    77,682.98x = 107,220.21 × 54,998.39
  4. Step 4: Simplify right side
    77,682.98x = 5,896,938,925.46
  5. Step 5: Solve for x
    x = 5,896,938,925.46/77,682.98
  6. Step 6: Final answer
    x = 75,910.31

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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.