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Finding the Fourth Proportional to 219,496.40, 328,985.40 and 93,136.40

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Solution

The fourth proportional to 219,496.40, 328,985.40 and 93,136.40 is: 139,594.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,496.40 : 328,985.40 = 93,136.40 : x
  2. Step 2: Convert to fraction form
    219,496.40/328,985.40 = 93,136.40/x
  3. Step 3: Cross multiply
    219,496.40x = 328,985.40 × 93,136.40
  4. Step 4: Simplify right side
    219,496.40x = 30,640,515,808.56
  5. Step 5: Solve for x
    x = 30,640,515,808.56/219,496.40
  6. Step 6: Final answer
    x = 139,594.62

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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.