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Finding the Fourth Proportional to 128,032.48, 176,706.39 and 74,362.42

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Solution

The fourth proportional to 128,032.48, 176,706.39 and 74,362.42 is: 102,632.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,032.48 : 176,706.39 = 74,362.42 : x
  2. Step 2: Convert to fraction form
    128,032.48/176,706.39 = 74,362.42/x
  3. Step 3: Cross multiply
    128,032.48x = 176,706.39 × 74,362.42
  4. Step 4: Simplify right side
    128,032.48x = 13,140,314,789.86
  5. Step 5: Solve for x
    x = 13,140,314,789.86/128,032.48
  6. Step 6: Final answer
    x = 102,632.67

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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.