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Finding the Fourth Proportional to 105,250.56, 145,245.60 and 57,503.90

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Solution

The fourth proportional to 105,250.56, 145,245.60 and 57,503.90 is: 79,355.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,250.56 : 145,245.60 = 57,503.90 : x
  2. Step 2: Convert to fraction form
    105,250.56/145,245.60 = 57,503.90/x
  3. Step 3: Cross multiply
    105,250.56x = 145,245.60 × 57,503.90
  4. Step 4: Simplify right side
    105,250.56x = 8,352,187,731.61
  5. Step 5: Solve for x
    x = 8,352,187,731.61/105,250.56
  6. Step 6: Final answer
    x = 79,355.28

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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.