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Finding the Fourth Proportional to 58,228.40, 87,361.06 and 20,787.66

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Solution

The fourth proportional to 58,228.40, 87,361.06 and 20,787.66 is: 31,188.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,228.40 : 87,361.06 = 20,787.66 : x
  2. Step 2: Convert to fraction form
    58,228.40/87,361.06 = 20,787.66/x
  3. Step 3: Cross multiply
    58,228.40x = 87,361.06 × 20,787.66
  4. Step 4: Simplify right side
    58,228.40x = 1,816,032,012.52
  5. Step 5: Solve for x
    x = 1,816,032,012.52/58,228.40
  6. Step 6: Final answer
    x = 31,188.08

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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.