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Finding the Fourth Proportional to 52,609.32, 78,862.02 and 21,000.33

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Solution

The fourth proportional to 52,609.32, 78,862.02 and 21,000.33 is: 31,479.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,609.32 : 78,862.02 = 21,000.33 : x
  2. Step 2: Convert to fraction form
    52,609.32/78,862.02 = 21,000.33/x
  3. Step 3: Cross multiply
    52,609.32x = 78,862.02 × 21,000.33
  4. Step 4: Simplify right side
    52,609.32x = 1,656,128,444.47
  5. Step 5: Solve for x
    x = 1,656,128,444.47/52,609.32
  6. Step 6: Final answer
    x = 31,479.75

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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.