Home / 138,198.63-190,711.86-77,769.24

Finding the Fourth Proportional to 138,198.63, 190,711.86 and 77,769.24

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Solution

The fourth proportional to 138,198.63, 190,711.86 and 77,769.24 is: 107,320.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,198.63 : 190,711.86 = 77,769.24 : x
  2. Step 2: Convert to fraction form
    138,198.63/190,711.86 = 77,769.24/x
  3. Step 3: Cross multiply
    138,198.63x = 190,711.86 × 77,769.24
  4. Step 4: Simplify right side
    138,198.63x = 14,831,516,411.19
  5. Step 5: Solve for x
    x = 14,831,516,411.19/138,198.63
  6. Step 6: Final answer
    x = 107,320.29

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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.