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Finding the Fourth Proportional to 29,142.40, 43,616.40 and 25,643.20

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Solution

The fourth proportional to 29,142.40, 43,616.40 and 25,643.20 is: 38,379.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,142.40 : 43,616.40 = 25,643.20 : x
  2. Step 2: Convert to fraction form
    29,142.40/43,616.40 = 25,643.20/x
  3. Step 3: Cross multiply
    29,142.40x = 43,616.40 × 25,643.20
  4. Step 4: Simplify right side
    29,142.40x = 1,118,464,068.48
  5. Step 5: Solve for x
    x = 1,118,464,068.48/29,142.40
  6. Step 6: Final answer
    x = 38,379.27

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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.