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Finding the Fourth Proportional to 64,390.40, 96,585.60 and 36,742.40

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Solution

The fourth proportional to 64,390.40, 96,585.60 and 36,742.40 is: 55,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,390.40 : 96,585.60 = 36,742.40 : x
  2. Step 2: Convert to fraction form
    64,390.40/96,585.60 = 36,742.40/x
  3. Step 3: Cross multiply
    64,390.40x = 96,585.60 × 36,742.40
  4. Step 4: Simplify right side
    64,390.40x = 3,548,786,749.44
  5. Step 5: Solve for x
    x = 3,548,786,749.44/64,390.40
  6. Step 6: Final answer
    x = 55,113.60

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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.