Home / 130,679.40-180,378.18-103,869.48

Finding the Fourth Proportional to 130,679.40, 180,378.18 and 103,869.48

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Solution

The fourth proportional to 130,679.40, 180,378.18 and 103,869.48 is: 143,372.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,679.40 : 180,378.18 = 103,869.48 : x
  2. Step 2: Convert to fraction form
    130,679.40/180,378.18 = 103,869.48/x
  3. Step 3: Cross multiply
    130,679.40x = 180,378.18 × 103,869.48
  4. Step 4: Simplify right side
    130,679.40x = 18,735,787,759.95
  5. Step 5: Solve for x
    x = 18,735,787,759.95/130,679.40
  6. Step 6: Final answer
    x = 143,372.16

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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.