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Finding the Fourth Proportional to 99,816.71, 149,702.18 and 28,739.21

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Solution

The fourth proportional to 99,816.71, 149,702.18 and 28,739.21 is: 43,102.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,816.71 : 149,702.18 = 28,739.21 : x
  2. Step 2: Convert to fraction form
    99,816.71/149,702.18 = 28,739.21/x
  3. Step 3: Cross multiply
    99,816.71x = 149,702.18 × 28,739.21
  4. Step 4: Simplify right side
    99,816.71x = 4,302,321,496.27
  5. Step 5: Solve for x
    x = 4,302,321,496.27/99,816.71
  6. Step 6: Final answer
    x = 43,102.22

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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.