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Finding the Fourth Proportional to 128,735.16, 192,790.95 and 65,388.66

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Solution

The fourth proportional to 128,735.16, 192,790.95 and 65,388.66 is: 97,924.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,735.16 : 192,790.95 = 65,388.66 : x
  2. Step 2: Convert to fraction form
    128,735.16/192,790.95 = 65,388.66/x
  3. Step 3: Cross multiply
    128,735.16x = 192,790.95 × 65,388.66
  4. Step 4: Simplify right side
    128,735.16x = 12,606,341,880.63
  5. Step 5: Solve for x
    x = 12,606,341,880.63/128,735.16
  6. Step 6: Final answer
    x = 97,924.62

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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.