Home / 128,135.16-192,069-43,870.50

Finding the Fourth Proportional to 128,135.16, 192,069 and 43,870.50

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Solution

The fourth proportional to 128,135.16, 192,069 and 43,870.50 is: 65,759.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,135.16 : 192,069 = 43,870.50 : x
  2. Step 2: Convert to fraction form
    128,135.16/192,069 = 43,870.50/x
  3. Step 3: Cross multiply
    128,135.16x = 192,069 × 43,870.50
  4. Step 4: Simplify right side
    128,135.16x = 8,426,163,064.50
  5. Step 5: Solve for x
    x = 8,426,163,064.50/128,135.16
  6. Step 6: Final answer
    x = 65,759.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.