Home / 130,815.72-180,181.80-100,543.14

Finding the Fourth Proportional to 130,815.72, 180,181.80 and 100,543.14

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Solution

The fourth proportional to 130,815.72, 180,181.80 and 100,543.14 is: 138,485.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,815.72 : 180,181.80 = 100,543.14 : x
  2. Step 2: Convert to fraction form
    130,815.72/180,181.80 = 100,543.14/x
  3. Step 3: Cross multiply
    130,815.72x = 180,181.80 × 100,543.14
  4. Step 4: Simplify right side
    130,815.72x = 18,116,043,942.85
  5. Step 5: Solve for x
    x = 18,116,043,942.85/130,815.72
  6. Step 6: Final answer
    x = 138,485.22

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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.