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Finding the Fourth Proportional to 83,208.80, 124,928.40 and 65,698.40

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Solution

The fourth proportional to 83,208.80, 124,928.40 and 65,698.40 is: 98,638.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,208.80 : 124,928.40 = 65,698.40 : x
  2. Step 2: Convert to fraction form
    83,208.80/124,928.40 = 65,698.40/x
  3. Step 3: Cross multiply
    83,208.80x = 124,928.40 × 65,698.40
  4. Step 4: Simplify right side
    83,208.80x = 8,207,595,994.56
  5. Step 5: Solve for x
    x = 8,207,595,994.56/83,208.80
  6. Step 6: Final answer
    x = 98,638.56

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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.