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Finding the Fourth Proportional to 126,640.60, 189,807.30 and 56,445.40

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Solution

The fourth proportional to 126,640.60, 189,807.30 and 56,445.40 is: 84,599.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,640.60 : 189,807.30 = 56,445.40 : x
  2. Step 2: Convert to fraction form
    126,640.60/189,807.30 = 56,445.40/x
  3. Step 3: Cross multiply
    126,640.60x = 189,807.30 × 56,445.40
  4. Step 4: Simplify right side
    126,640.60x = 10,713,748,971.42
  5. Step 5: Solve for x
    x = 10,713,748,971.42/126,640.60
  6. Step 6: Final answer
    x = 84,599.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.