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Finding the Fourth Proportional to 164,941.20, 247,411.80 and 86,209.20

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Solution

The fourth proportional to 164,941.20, 247,411.80 and 86,209.20 is: 129,313.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,941.20 : 247,411.80 = 86,209.20 : x
  2. Step 2: Convert to fraction form
    164,941.20/247,411.80 = 86,209.20/x
  3. Step 3: Cross multiply
    164,941.20x = 247,411.80 × 86,209.20
  4. Step 4: Simplify right side
    164,941.20x = 21,329,173,348.56
  5. Step 5: Solve for x
    x = 21,329,173,348.56/164,941.20
  6. Step 6: Final answer
    x = 129,313.80

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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.