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Finding the Fourth Proportional to 60,857.88, 91,291.64 and 21,423.84

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Solution

The fourth proportional to 60,857.88, 91,291.64 and 21,423.84 is: 32,137.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,857.88 : 91,291.64 = 21,423.84 : x
  2. Step 2: Convert to fraction form
    60,857.88/91,291.64 = 21,423.84/x
  3. Step 3: Cross multiply
    60,857.88x = 91,291.64 × 21,423.84
  4. Step 4: Simplify right side
    60,857.88x = 1,955,817,381.58
  5. Step 5: Solve for x
    x = 1,955,817,381.58/60,857.88
  6. Step 6: Final answer
    x = 32,137.46

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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.