Home / 130,571.49-180,290.34-100,308.81

Finding the Fourth Proportional to 130,571.49, 180,290.34 and 100,308.81

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Solution

The fourth proportional to 130,571.49, 180,290.34 and 100,308.81 is: 138,504.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,571.49 : 180,290.34 = 100,308.81 : x
  2. Step 2: Convert to fraction form
    130,571.49/180,290.34 = 100,308.81/x
  3. Step 3: Cross multiply
    130,571.49x = 180,290.34 × 100,308.81
  4. Step 4: Simplify right side
    130,571.49x = 18,084,709,459.90
  5. Step 5: Solve for x
    x = 18,084,709,459.90/130,571.49
  6. Step 6: Final answer
    x = 138,504.27

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1.5x scale

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.