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Finding the Fourth Proportional to 128,296.81, 177,042.42 and 70,932.79

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Solution

The fourth proportional to 128,296.81, 177,042.42 and 70,932.79 is: 97,883.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,296.81 : 177,042.42 = 70,932.79 : x
  2. Step 2: Convert to fraction form
    128,296.81/177,042.42 = 70,932.79/x
  3. Step 3: Cross multiply
    128,296.81x = 177,042.42 × 70,932.79
  4. Step 4: Simplify right side
    128,296.81x = 12,558,112,798.95
  5. Step 5: Solve for x
    x = 12,558,112,798.95/128,296.81
  6. Step 6: Final answer
    x = 97,883.28

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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.