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Finding the Fourth Proportional to 53,291.25, 79,931.21 and 28,304.78

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Solution

The fourth proportional to 53,291.25, 79,931.21 and 28,304.78 is: 42,454.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,291.25 : 79,931.21 = 28,304.78 : x
  2. Step 2: Convert to fraction form
    53,291.25/79,931.21 = 28,304.78/x
  3. Step 3: Cross multiply
    53,291.25x = 79,931.21 × 28,304.78
  4. Step 4: Simplify right side
    53,291.25x = 2,262,434,773.00
  5. Step 5: Solve for x
    x = 2,262,434,773.00/53,291.25
  6. Step 6: Final answer
    x = 42,454.15

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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.