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Finding the Fourth Proportional to 154,692.77, 213,465.27 and 85,785.78

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Solution

The fourth proportional to 154,692.77, 213,465.27 and 85,785.78 is: 118,378.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,692.77 : 213,465.27 = 85,785.78 : x
  2. Step 2: Convert to fraction form
    154,692.77/213,465.27 = 85,785.78/x
  3. Step 3: Cross multiply
    154,692.77x = 213,465.27 × 85,785.78
  4. Step 4: Simplify right side
    154,692.77x = 18,312,285,812.05
  5. Step 5: Solve for x
    x = 18,312,285,812.05/154,692.77
  6. Step 6: Final answer
    x = 118,378.42

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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.