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Finding the Fourth Proportional to 199,606.40, 299,149.60 and 81,139.36

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Solution

The fourth proportional to 199,606.40, 299,149.60 and 81,139.36 is: 121,603.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,606.40 : 299,149.60 = 81,139.36 : x
  2. Step 2: Convert to fraction form
    199,606.40/299,149.60 = 81,139.36/x
  3. Step 3: Cross multiply
    199,606.40x = 299,149.60 × 81,139.36
  4. Step 4: Simplify right side
    199,606.40x = 24,272,807,088.26
  5. Step 5: Solve for x
    x = 24,272,807,088.26/199,606.40
  6. Step 6: Final answer
    x = 121,603.35

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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.