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Finding the Fourth Proportional to 192,980.81, 265,981.02 and 128,334.49

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Solution

The fourth proportional to 192,980.81, 265,981.02 and 128,334.49 is: 176,880.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,980.81 : 265,981.02 = 128,334.49 : x
  2. Step 2: Convert to fraction form
    192,980.81/265,981.02 = 128,334.49/x
  3. Step 3: Cross multiply
    192,980.81x = 265,981.02 × 128,334.49
  4. Step 4: Simplify right side
    192,980.81x = 34,134,537,886.43
  5. Step 5: Solve for x
    x = 34,134,537,886.43/192,980.81
  6. Step 6: Final answer
    x = 176,880.48

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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.