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Finding the Fourth Proportional to 128,308.28, 192,486.72 and 58,193.12

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Solution

The fourth proportional to 128,308.28, 192,486.72 and 58,193.12 is: 87,300.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,308.28 : 192,486.72 = 58,193.12 : x
  2. Step 2: Convert to fraction form
    128,308.28/192,486.72 = 58,193.12/x
  3. Step 3: Cross multiply
    128,308.28x = 192,486.72 × 58,193.12
  4. Step 4: Simplify right side
    128,308.28x = 11,201,402,795.37
  5. Step 5: Solve for x
    x = 11,201,402,795.37/128,308.28
  6. Step 6: Final answer
    x = 87,300.70

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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.