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Finding the Fourth Proportional to 53,291.40, 79,882.02 and 19,987.98

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Solution

The fourth proportional to 53,291.40, 79,882.02 and 19,987.98 is: 29,961.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,291.40 : 79,882.02 = 19,987.98 : x
  2. Step 2: Convert to fraction form
    53,291.40/79,882.02 = 19,987.98/x
  3. Step 3: Cross multiply
    53,291.40x = 79,882.02 × 19,987.98
  4. Step 4: Simplify right side
    53,291.40x = 1,596,680,218.12
  5. Step 5: Solve for x
    x = 1,596,680,218.12/53,291.40
  6. Step 6: Final answer
    x = 29,961.31

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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.