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Finding the Fourth Proportional to 55,999.36, 83,999.90 and 20,467.90

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Solution

The fourth proportional to 55,999.36, 83,999.90 and 20,467.90 is: 30,702.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,999.36 : 83,999.90 = 20,467.90 : x
  2. Step 2: Convert to fraction form
    55,999.36/83,999.90 = 20,467.90/x
  3. Step 3: Cross multiply
    55,999.36x = 83,999.90 × 20,467.90
  4. Step 4: Simplify right side
    55,999.36x = 1,719,301,741.16
  5. Step 5: Solve for x
    x = 1,719,301,741.16/55,999.36
  6. Step 6: Final answer
    x = 30,702.17

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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.