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Finding the Fourth Proportional to 134,779.63, 186,068.73 and 81,076.63

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Solution

The fourth proportional to 134,779.63, 186,068.73 and 81,076.63 is: 111,929.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,779.63 : 186,068.73 = 81,076.63 : x
  2. Step 2: Convert to fraction form
    134,779.63/186,068.73 = 81,076.63/x
  3. Step 3: Cross multiply
    134,779.63x = 186,068.73 × 81,076.63
  4. Step 4: Simplify right side
    134,779.63x = 15,085,825,576.78
  5. Step 5: Solve for x
    x = 15,085,825,576.78/134,779.63
  6. Step 6: Final answer
    x = 111,929.57

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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.