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Finding the Fourth Proportional to 52,479.66, 72,429.48 and 31,259.28

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Solution

The fourth proportional to 52,479.66, 72,429.48 and 31,259.28 is: 43,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,479.66 : 72,429.48 = 31,259.28 : x
  2. Step 2: Convert to fraction form
    52,479.66/72,429.48 = 31,259.28/x
  3. Step 3: Cross multiply
    52,479.66x = 72,429.48 × 31,259.28
  4. Step 4: Simplify right side
    52,479.66x = 2,264,093,395.57
  5. Step 5: Solve for x
    x = 2,264,093,395.57/52,479.66
  6. Step 6: Final answer
    x = 43,142.30

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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.