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Finding the Fourth Proportional to 218,711.66, 301,828.41 and 128,059.11

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Solution

The fourth proportional to 218,711.66, 301,828.41 and 128,059.11 is: 176,725.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,711.66 : 301,828.41 = 128,059.11 : x
  2. Step 2: Convert to fraction form
    218,711.66/301,828.41 = 128,059.11/x
  3. Step 3: Cross multiply
    218,711.66x = 301,828.41 × 128,059.11
  4. Step 4: Simplify right side
    218,711.66x = 38,651,877,557.32
  5. Step 5: Solve for x
    x = 38,651,877,557.32/218,711.66
  6. Step 6: Final answer
    x = 176,725.28

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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.