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Finding the Fourth Proportional to 98,670.42, 148,005.63 and 79,072.47

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Solution

The fourth proportional to 98,670.42, 148,005.63 and 79,072.47 is: 118,608.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,670.42 : 148,005.63 = 79,072.47 : x
  2. Step 2: Convert to fraction form
    98,670.42/148,005.63 = 79,072.47/x
  3. Step 3: Cross multiply
    98,670.42x = 148,005.63 × 79,072.47
  4. Step 4: Simplify right side
    98,670.42x = 11,703,170,738.01
  5. Step 5: Solve for x
    x = 11,703,170,738.01/98,670.42
  6. Step 6: Final answer
    x = 118,608.71

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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.