Home / 189,393.20-261,126.28-121,298.28

Finding the Fourth Proportional to 189,393.20, 261,126.28 and 121,298.28

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Solution

The fourth proportional to 189,393.20, 261,126.28 and 121,298.28 is: 167,240.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,393.20 : 261,126.28 = 121,298.28 : x
  2. Step 2: Convert to fraction form
    189,393.20/261,126.28 = 121,298.28/x
  3. Step 3: Cross multiply
    189,393.20x = 261,126.28 × 121,298.28
  4. Step 4: Simplify right side
    189,393.20x = 31,674,168,626.80
  5. Step 5: Solve for x
    x = 31,674,168,626.80/189,393.20
  6. Step 6: Final answer
    x = 167,240.26

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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.