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Finding the Fourth Proportional to 98,749.60, 148,124.40 and 68,682.40

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Solution

The fourth proportional to 98,749.60, 148,124.40 and 68,682.40 is: 103,023.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,749.60 : 148,124.40 = 68,682.40 : x
  2. Step 2: Convert to fraction form
    98,749.60/148,124.40 = 68,682.40/x
  3. Step 3: Cross multiply
    98,749.60x = 148,124.40 × 68,682.40
  4. Step 4: Simplify right side
    98,749.60x = 10,173,539,290.56
  5. Step 5: Solve for x
    x = 10,173,539,290.56/98,749.60
  6. Step 6: Final answer
    x = 103,023.60

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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.