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Finding the Fourth Proportional to 42,161.79, 63,235.40 and 14,459.79

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Solution

The fourth proportional to 42,161.79, 63,235.40 and 14,459.79 is: 21,687.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,161.79 : 63,235.40 = 14,459.79 : x
  2. Step 2: Convert to fraction form
    42,161.79/63,235.40 = 14,459.79/x
  3. Step 3: Cross multiply
    42,161.79x = 63,235.40 × 14,459.79
  4. Step 4: Simplify right side
    42,161.79x = 914,370,532.27
  5. Step 5: Solve for x
    x = 914,370,532.27/42,161.79
  6. Step 6: Final answer
    x = 21,687.18

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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.