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Finding the Fourth Proportional to 98,989.26, 148,483.90 and 28,868.58

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Solution

The fourth proportional to 98,989.26, 148,483.90 and 28,868.58 is: 43,302.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,989.26 : 148,483.90 = 28,868.58 : x
  2. Step 2: Convert to fraction form
    98,989.26/148,483.90 = 28,868.58/x
  3. Step 3: Cross multiply
    98,989.26x = 148,483.90 × 28,868.58
  4. Step 4: Simplify right side
    98,989.26x = 4,286,519,345.86
  5. Step 5: Solve for x
    x = 4,286,519,345.86/98,989.26
  6. Step 6: Final answer
    x = 43,302.87

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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.