Home / 130,631.23-180,287.78-76,921.25

Finding the Fourth Proportional to 130,631.23, 180,287.78 and 76,921.25

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Solution

The fourth proportional to 130,631.23, 180,287.78 and 76,921.25 is: 106,161.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,631.23 : 180,287.78 = 76,921.25 : x
  2. Step 2: Convert to fraction form
    130,631.23/180,287.78 = 76,921.25/x
  3. Step 3: Cross multiply
    130,631.23x = 180,287.78 × 76,921.25
  4. Step 4: Simplify right side
    130,631.23x = 13,867,960,111.28
  5. Step 5: Solve for x
    x = 13,867,960,111.28/130,631.23
  6. Step 6: Final answer
    x = 106,161.14

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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.