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Finding the Fourth Proportional to 146,422.80, 219,634.20 and 86,547.60

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Solution

The fourth proportional to 146,422.80, 219,634.20 and 86,547.60 is: 129,821.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,422.80 : 219,634.20 = 86,547.60 : x
  2. Step 2: Convert to fraction form
    146,422.80/219,634.20 = 86,547.60/x
  3. Step 3: Cross multiply
    146,422.80x = 219,634.20 × 86,547.60
  4. Step 4: Simplify right side
    146,422.80x = 19,008,812,887.92
  5. Step 5: Solve for x
    x = 19,008,812,887.92/146,422.80
  6. Step 6: Final answer
    x = 129,821.40

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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.