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Finding the Fourth Proportional to 61,259, 91,872.08 and 16,875.20

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Solution

The fourth proportional to 61,259, 91,872.08 and 16,875.20 is: 25,308.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,259 : 91,872.08 = 16,875.20 : x
  2. Step 2: Convert to fraction form
    61,259/91,872.08 = 16,875.20/x
  3. Step 3: Cross multiply
    61,259x = 91,872.08 × 16,875.20
  4. Step 4: Simplify right side
    61,259x = 1,550,359,724.42
  5. Step 5: Solve for x
    x = 1,550,359,724.42/61,259
  6. Step 6: Final answer
    x = 25,308.28

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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.