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Finding the Fourth Proportional to 128,015.69, 176,723.10 and 74,292.03

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Solution

The fourth proportional to 128,015.69, 176,723.10 and 74,292.03 is: 102,558.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,015.69 : 176,723.10 = 74,292.03 : x
  2. Step 2: Convert to fraction form
    128,015.69/176,723.10 = 74,292.03/x
  3. Step 3: Cross multiply
    128,015.69x = 176,723.10 × 74,292.03
  4. Step 4: Simplify right side
    128,015.69x = 13,129,117,846.89
  5. Step 5: Solve for x
    x = 13,129,117,846.89/128,015.69
  6. Step 6: Final answer
    x = 102,558.67

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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.