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Finding the Fourth Proportional to 189,090.05, 260,940.77 and 103,049.72

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Solution

The fourth proportional to 189,090.05, 260,940.77 and 103,049.72 is: 142,206.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,090.05 : 260,940.77 = 103,049.72 : x
  2. Step 2: Convert to fraction form
    189,090.05/260,940.77 = 103,049.72/x
  3. Step 3: Cross multiply
    189,090.05x = 260,940.77 × 103,049.72
  4. Step 4: Simplify right side
    189,090.05x = 26,889,871,465.13
  5. Step 5: Solve for x
    x = 26,889,871,465.13/189,090.05
  6. Step 6: Final answer
    x = 142,206.70

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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.