Home / 130,743.64-180,206.94-100,106.20

Finding the Fourth Proportional to 130,743.64, 180,206.94 and 100,106.20

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Solution

The fourth proportional to 130,743.64, 180,206.94 and 100,106.20 is: 137,978.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,743.64 : 180,206.94 = 100,106.20 : x
  2. Step 2: Convert to fraction form
    130,743.64/180,206.94 = 100,106.20/x
  3. Step 3: Cross multiply
    130,743.64x = 180,206.94 × 100,106.20
  4. Step 4: Simplify right side
    130,743.64x = 18,039,831,977.03
  5. Step 5: Solve for x
    x = 18,039,831,977.03/130,743.64
  6. Step 6: Final answer
    x = 137,978.66

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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.