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Finding the Fourth Proportional to 425,549.61, 638,323.25 and 126,053.54

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Solution

The fourth proportional to 425,549.61, 638,323.25 and 126,053.54 is: 189,079.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,549.61 : 638,323.25 = 126,053.54 : x
  2. Step 2: Convert to fraction form
    425,549.61/638,323.25 = 126,053.54/x
  3. Step 3: Cross multiply
    425,549.61x = 638,323.25 × 126,053.54
  4. Step 4: Simplify right side
    425,549.61x = 80,462,903,898.63
  5. Step 5: Solve for x
    x = 80,462,903,898.63/425,549.61
  6. Step 6: Final answer
    x = 189,079.96

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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.