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Finding the Fourth Proportional to 124,530.40, 171,799.95 and 81,520.41

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Solution

The fourth proportional to 124,530.40, 171,799.95 and 81,520.41 is: 112,464.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,530.40 : 171,799.95 = 81,520.41 : x
  2. Step 2: Convert to fraction form
    124,530.40/171,799.95 = 81,520.41/x
  3. Step 3: Cross multiply
    124,530.40x = 171,799.95 × 81,520.41
  4. Step 4: Simplify right side
    124,530.40x = 14,005,202,361.98
  5. Step 5: Solve for x
    x = 14,005,202,361.98/124,530.40
  6. Step 6: Final answer
    x = 112,464.12

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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.