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Finding the Fourth Proportional to 126,624.60, 189,783.30 and 56,429.40

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Solution

The fourth proportional to 126,624.60, 189,783.30 and 56,429.40 is: 84,575.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,624.60 : 189,783.30 = 56,429.40 : x
  2. Step 2: Convert to fraction form
    126,624.60/189,783.30 = 56,429.40/x
  3. Step 3: Cross multiply
    126,624.60x = 189,783.30 × 56,429.40
  4. Step 4: Simplify right side
    126,624.60x = 10,709,357,749.02
  5. Step 5: Solve for x
    x = 10,709,357,749.02/126,624.60
  6. Step 6: Final answer
    x = 84,575.65

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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.