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Finding the Fourth Proportional to 65,340.56, 90,136.74 and 42,692.80

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Solution

The fourth proportional to 65,340.56, 90,136.74 and 42,692.80 is: 58,894.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,340.56 : 90,136.74 = 42,692.80 : x
  2. Step 2: Convert to fraction form
    65,340.56/90,136.74 = 42,692.80/x
  3. Step 3: Cross multiply
    65,340.56x = 90,136.74 × 42,692.80
  4. Step 4: Simplify right side
    65,340.56x = 3,848,189,813.47
  5. Step 5: Solve for x
    x = 3,848,189,813.47/65,340.56
  6. Step 6: Final answer
    x = 58,894.35

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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.