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Finding the Fourth Proportional to 128,087.70, 176,747.39 and 74,362.67

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Solution

The fourth proportional to 128,087.70, 176,747.39 and 74,362.67 is: 102,612.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,087.70 : 176,747.39 = 74,362.67 : x
  2. Step 2: Convert to fraction form
    128,087.70/176,747.39 = 74,362.67/x
  3. Step 3: Cross multiply
    128,087.70x = 176,747.39 × 74,362.67
  4. Step 4: Simplify right side
    128,087.70x = 13,143,408,091.89
  5. Step 5: Solve for x
    x = 13,143,408,091.89/128,087.70
  6. Step 6: Final answer
    x = 102,612.57

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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.