Home / 130,485.94-180,157.32-100,217.18

Finding the Fourth Proportional to 130,485.94, 180,157.32 and 100,217.18

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Solution

The fourth proportional to 130,485.94, 180,157.32 and 100,217.18 is: 138,366.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,485.94 : 180,157.32 = 100,217.18 : x
  2. Step 2: Convert to fraction form
    130,485.94/180,157.32 = 100,217.18/x
  3. Step 3: Cross multiply
    130,485.94x = 180,157.32 × 100,217.18
  4. Step 4: Simplify right side
    130,485.94x = 18,054,858,566.76
  5. Step 5: Solve for x
    x = 18,054,858,566.76/130,485.94
  6. Step 6: Final answer
    x = 138,366.31

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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.