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Finding the Fourth Proportional to 84,029.60, 125,890.80 and 68,362.40

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Solution

The fourth proportional to 84,029.60, 125,890.80 and 68,362.40 is: 102,418.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,029.60 : 125,890.80 = 68,362.40 : x
  2. Step 2: Convert to fraction form
    84,029.60/125,890.80 = 68,362.40/x
  3. Step 3: Cross multiply
    84,029.60x = 125,890.80 × 68,362.40
  4. Step 4: Simplify right side
    84,029.60x = 8,606,197,225.92
  5. Step 5: Solve for x
    x = 8,606,197,225.92/84,029.60
  6. Step 6: Final answer
    x = 102,418.64

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1.5x scale

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.