Home / 115,816.10-173,724.15-80,386.70

Finding the Fourth Proportional to 115,816.10, 173,724.15 and 80,386.70

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Solution

The fourth proportional to 115,816.10, 173,724.15 and 80,386.70 is: 120,580.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,816.10 : 173,724.15 = 80,386.70 : x
  2. Step 2: Convert to fraction form
    115,816.10/173,724.15 = 80,386.70/x
  3. Step 3: Cross multiply
    115,816.10x = 173,724.15 × 80,386.70
  4. Step 4: Simplify right side
    115,816.10x = 13,965,111,128.81
  5. Step 5: Solve for x
    x = 13,965,111,128.81/115,816.10
  6. Step 6: Final answer
    x = 120,580.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.