Home / 142,146.64-196,161.09-78,483.07

Finding the Fourth Proportional to 142,146.64, 196,161.09 and 78,483.07

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Solution

The fourth proportional to 142,146.64, 196,161.09 and 78,483.07 is: 108,305.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,146.64 : 196,161.09 = 78,483.07 : x
  2. Step 2: Convert to fraction form
    142,146.64/196,161.09 = 78,483.07/x
  3. Step 3: Cross multiply
    142,146.64x = 196,161.09 × 78,483.07
  4. Step 4: Simplify right side
    142,146.64x = 15,395,323,576.94
  5. Step 5: Solve for x
    x = 15,395,323,576.94/142,146.64
  6. Step 6: Final answer
    x = 108,305.93

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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.