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Finding the Fourth Proportional to 98,418.81, 147,406.26 and 45,717.39

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Solution

The fourth proportional to 98,418.81, 147,406.26 and 45,717.39 is: 68,472.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,418.81 : 147,406.26 = 45,717.39 : x
  2. Step 2: Convert to fraction form
    98,418.81/147,406.26 = 45,717.39/x
  3. Step 3: Cross multiply
    98,418.81x = 147,406.26 × 45,717.39
  4. Step 4: Simplify right side
    98,418.81x = 6,739,029,476.86
  5. Step 5: Solve for x
    x = 6,739,029,476.86/98,418.81
  6. Step 6: Final answer
    x = 68,472.98

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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.