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Finding the Fourth Proportional to 135,189.88, 186,548.70 and 78,605.08

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Solution

The fourth proportional to 135,189.88, 186,548.70 and 78,605.08 is: 108,467.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,189.88 : 186,548.70 = 78,605.08 : x
  2. Step 2: Convert to fraction form
    135,189.88/186,548.70 = 78,605.08/x
  3. Step 3: Cross multiply
    135,189.88x = 186,548.70 × 78,605.08
  4. Step 4: Simplify right side
    135,189.88x = 14,663,675,487.40
  5. Step 5: Solve for x
    x = 14,663,675,487.40/135,189.88
  6. Step 6: Final answer
    x = 108,467.26

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1.5x scale

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.