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Finding the Fourth Proportional to 104,892.80, 144,590.40 and 83,638.40

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Solution

The fourth proportional to 104,892.80, 144,590.40 and 83,638.40 is: 115,292.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,892.80 : 144,590.40 = 83,638.40 : x
  2. Step 2: Convert to fraction form
    104,892.80/144,590.40 = 83,638.40/x
  3. Step 3: Cross multiply
    104,892.80x = 144,590.40 × 83,638.40
  4. Step 4: Simplify right side
    104,892.80x = 12,093,309,711.36
  5. Step 5: Solve for x
    x = 12,093,309,711.36/104,892.80
  6. Step 6: Final answer
    x = 115,292.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.