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Finding the Fourth Proportional to 126,573.84, 189,789.68 and 42,289.59

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Solution

The fourth proportional to 126,573.84, 189,789.68 and 42,289.59 is: 63,410.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,573.84 : 189,789.68 = 42,289.59 : x
  2. Step 2: Convert to fraction form
    126,573.84/189,789.68 = 42,289.59/x
  3. Step 3: Cross multiply
    126,573.84x = 189,789.68 × 42,289.59
  4. Step 4: Simplify right side
    126,573.84x = 8,026,128,570.87
  5. Step 5: Solve for x
    x = 8,026,128,570.87/126,573.84
  6. Step 6: Final answer
    x = 63,410.64

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1.5x scale

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.