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Finding the Fourth Proportional to 189,143.64, 261,015.40 and 104,258.88

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Solution

The fourth proportional to 189,143.64, 261,015.40 and 104,258.88 is: 143,875.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,143.64 : 261,015.40 = 104,258.88 : x
  2. Step 2: Convert to fraction form
    189,143.64/261,015.40 = 104,258.88/x
  3. Step 3: Cross multiply
    189,143.64x = 261,015.40 × 104,258.88
  4. Step 4: Simplify right side
    189,143.64x = 27,213,173,266.75
  5. Step 5: Solve for x
    x = 27,213,173,266.75/189,143.64
  6. Step 6: Final answer
    x = 143,875.70

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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.