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Finding the Fourth Proportional to 189,431.60, 261,449.48 and 112,955.64

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Solution

The fourth proportional to 189,431.60, 261,449.48 and 112,955.64 is: 155,898.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,431.60 : 261,449.48 = 112,955.64 : x
  2. Step 2: Convert to fraction form
    189,431.60/261,449.48 = 112,955.64/x
  3. Step 3: Cross multiply
    189,431.60x = 261,449.48 × 112,955.64
  4. Step 4: Simplify right side
    189,431.60x = 29,532,193,341.07
  5. Step 5: Solve for x
    x = 29,532,193,341.07/189,431.60
  6. Step 6: Final answer
    x = 155,898.98

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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.