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Finding the Fourth Proportional to 128,618.76, 192,941.50 and 35,124.50

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Solution

The fourth proportional to 128,618.76, 192,941.50 and 35,124.50 is: 52,690.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,618.76 : 192,941.50 = 35,124.50 : x
  2. Step 2: Convert to fraction form
    128,618.76/192,941.50 = 35,124.50/x
  3. Step 3: Cross multiply
    128,618.76x = 192,941.50 × 35,124.50
  4. Step 4: Simplify right side
    128,618.76x = 6,776,973,716.75
  5. Step 5: Solve for x
    x = 6,776,973,716.75/128,618.76
  6. Step 6: Final answer
    x = 52,690.40

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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.