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Finding the Fourth Proportional to 218,930.40, 328,136.40 and 92,570.40

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Solution

The fourth proportional to 218,930.40, 328,136.40 and 92,570.40 is: 138,746.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,930.40 : 328,136.40 = 92,570.40 : x
  2. Step 2: Convert to fraction form
    218,930.40/328,136.40 = 92,570.40/x
  3. Step 3: Cross multiply
    218,930.40x = 328,136.40 × 92,570.40
  4. Step 4: Simplify right side
    218,930.40x = 30,375,717,802.56
  5. Step 5: Solve for x
    x = 30,375,717,802.56/218,930.40
  6. Step 6: Final answer
    x = 138,746.00

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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.