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Finding the Fourth Proportional to 87,692.52, 121,015.51 and 47,406.30

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Solution

The fourth proportional to 87,692.52, 121,015.51 and 47,406.30 is: 65,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,692.52 : 121,015.51 = 47,406.30 : x
  2. Step 2: Convert to fraction form
    87,692.52/121,015.51 = 47,406.30/x
  3. Step 3: Cross multiply
    87,692.52x = 121,015.51 × 47,406.30
  4. Step 4: Simplify right side
    87,692.52x = 5,736,897,571.71
  5. Step 5: Solve for x
    x = 5,736,897,571.71/87,692.52
  6. Step 6: Final answer
    x = 65,420.60

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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.