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Finding the Fourth Proportional to 98,721, 148,081.50 and 28,600.34

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Solution

The fourth proportional to 98,721, 148,081.50 and 28,600.34 is: 42,900.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,721 : 148,081.50 = 28,600.34 : x
  2. Step 2: Convert to fraction form
    98,721/148,081.50 = 28,600.34/x
  3. Step 3: Cross multiply
    98,721x = 148,081.50 × 28,600.34
  4. Step 4: Simplify right side
    98,721x = 4,235,181,247.71
  5. Step 5: Solve for x
    x = 4,235,181,247.71/98,721
  6. Step 6: Final answer
    x = 42,900.51

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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.