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Finding the Fourth Proportional to 100,986.84, 139,361.81 and 58,569.98

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Solution

The fourth proportional to 100,986.84, 139,361.81 and 58,569.98 is: 80,826.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,986.84 : 139,361.81 = 58,569.98 : x
  2. Step 2: Convert to fraction form
    100,986.84/139,361.81 = 58,569.98/x
  3. Step 3: Cross multiply
    100,986.84x = 139,361.81 × 58,569.98
  4. Step 4: Simplify right side
    100,986.84x = 8,162,417,434.80
  5. Step 5: Solve for x
    x = 8,162,417,434.80/100,986.84
  6. Step 6: Final answer
    x = 80,826.55

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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.