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Finding the Fourth Proportional to 157,755.34, 217,692.72 and 86,131.06

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Solution

The fourth proportional to 157,755.34, 217,692.72 and 86,131.06 is: 118,855.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,755.34 : 217,692.72 = 86,131.06 : x
  2. Step 2: Convert to fraction form
    157,755.34/217,692.72 = 86,131.06/x
  3. Step 3: Cross multiply
    157,755.34x = 217,692.72 × 86,131.06
  4. Step 4: Simplify right side
    157,755.34x = 18,750,104,727.88
  5. Step 5: Solve for x
    x = 18,750,104,727.88/157,755.34
  6. Step 6: Final answer
    x = 118,855.59

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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.