Home / 130,823.30-180,564.80-100,278.20

Finding the Fourth Proportional to 130,823.30, 180,564.80 and 100,278.20

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Solution

The fourth proportional to 130,823.30, 180,564.80 and 100,278.20 is: 138,405.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,823.30 : 180,564.80 = 100,278.20 : x
  2. Step 2: Convert to fraction form
    130,823.30/180,564.80 = 100,278.20/x
  3. Step 3: Cross multiply
    130,823.30x = 180,564.80 × 100,278.20
  4. Step 4: Simplify right side
    130,823.30x = 18,106,713,077.38
  5. Step 5: Solve for x
    x = 18,106,713,077.38/130,823.30
  6. Step 6: Final answer
    x = 138,405.87

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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.