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Finding the Fourth Proportional to 136,880.24, 188,889.40 and 85,920.32

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Solution

The fourth proportional to 136,880.24, 188,889.40 and 85,920.32 is: 118,566.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,880.24 : 188,889.40 = 85,920.32 : x
  2. Step 2: Convert to fraction form
    136,880.24/188,889.40 = 85,920.32/x
  3. Step 3: Cross multiply
    136,880.24x = 188,889.40 × 85,920.32
  4. Step 4: Simplify right side
    136,880.24x = 16,229,437,692.61
  5. Step 5: Solve for x
    x = 16,229,437,692.61/136,880.24
  6. Step 6: Final answer
    x = 118,566.70

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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.