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Finding the Fourth Proportional to 157,692.90, 217,608.21 and 86,072.34

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Solution

The fourth proportional to 157,692.90, 217,608.21 and 86,072.34 is: 118,775.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,692.90 : 217,608.21 = 86,072.34 : x
  2. Step 2: Convert to fraction form
    157,692.90/217,608.21 = 86,072.34/x
  3. Step 3: Cross multiply
    157,692.90x = 217,608.21 × 86,072.34
  4. Step 4: Simplify right side
    157,692.90x = 18,730,047,837.91
  5. Step 5: Solve for x
    x = 18,730,047,837.91/157,692.90
  6. Step 6: Final answer
    x = 118,775.47

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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.