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Finding the Fourth Proportional to 128,567.92, 177,364.80 and 83,260.50

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Solution

The fourth proportional to 128,567.92, 177,364.80 and 83,260.50 is: 114,861.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,567.92 : 177,364.80 = 83,260.50 : x
  2. Step 2: Convert to fraction form
    128,567.92/177,364.80 = 83,260.50/x
  3. Step 3: Cross multiply
    128,567.92x = 177,364.80 × 83,260.50
  4. Step 4: Simplify right side
    128,567.92x = 14,767,481,930.40
  5. Step 5: Solve for x
    x = 14,767,481,930.40/128,567.92
  6. Step 6: Final answer
    x = 114,861.33

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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.