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Finding the Fourth Proportional to 128,655.16, 193,279.40 and 123,340.84

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Solution

The fourth proportional to 128,655.16, 193,279.40 and 123,340.84 is: 185,295.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,655.16 : 193,279.40 = 123,340.84 : x
  2. Step 2: Convert to fraction form
    128,655.16/193,279.40 = 123,340.84/x
  3. Step 3: Cross multiply
    128,655.16x = 193,279.40 × 123,340.84
  4. Step 4: Simplify right side
    128,655.16x = 23,839,243,550.70
  5. Step 5: Solve for x
    x = 23,839,243,550.70/128,655.16
  6. Step 6: Final answer
    x = 185,295.67

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1.5x scale

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.