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Finding the Fourth Proportional to 127,966.50, 176,571.90 and 74,239.20

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Solution

The fourth proportional to 127,966.50, 176,571.90 and 74,239.20 is: 102,437.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,966.50 : 176,571.90 = 74,239.20 : x
  2. Step 2: Convert to fraction form
    127,966.50/176,571.90 = 74,239.20/x
  3. Step 3: Cross multiply
    127,966.50x = 176,571.90 × 74,239.20
  4. Step 4: Simplify right side
    127,966.50x = 13,108,556,598.48
  5. Step 5: Solve for x
    x = 13,108,556,598.48/127,966.50
  6. Step 6: Final answer
    x = 102,437.41

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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.