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Finding the Fourth Proportional to 118,458, 177,774.36 and 56,128.56

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Solution

The fourth proportional to 118,458, 177,774.36 and 56,128.56 is: 84,234.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,458 : 177,774.36 = 56,128.56 : x
  2. Step 2: Convert to fraction form
    118,458/177,774.36 = 56,128.56/x
  3. Step 3: Cross multiply
    118,458x = 177,774.36 × 56,128.56
  4. Step 4: Simplify right side
    118,458x = 9,978,218,831.72
  5. Step 5: Solve for x
    x = 9,978,218,831.72/118,458
  6. Step 6: Final answer
    x = 84,234.23

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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.