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Finding the Fourth Proportional to 85,347.72, 117,692.46 and 56,657.25

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Solution

The fourth proportional to 85,347.72, 117,692.46 and 56,657.25 is: 78,128.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,347.72 : 117,692.46 = 56,657.25 : x
  2. Step 2: Convert to fraction form
    85,347.72/117,692.46 = 56,657.25/x
  3. Step 3: Cross multiply
    85,347.72x = 117,692.46 × 56,657.25
  4. Step 4: Simplify right side
    85,347.72x = 6,668,131,129.34
  5. Step 5: Solve for x
    x = 6,668,131,129.34/85,347.72
  6. Step 6: Final answer
    x = 78,128.99

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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.