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Finding the Fourth Proportional to 118,328.64, 163,291.91 and 64,615.92

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Solution

The fourth proportional to 118,328.64, 163,291.91 and 64,615.92 is: 89,169.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,328.64 : 163,291.91 = 64,615.92 : x
  2. Step 2: Convert to fraction form
    118,328.64/163,291.91 = 64,615.92/x
  3. Step 3: Cross multiply
    118,328.64x = 163,291.91 × 64,615.92
  4. Step 4: Simplify right side
    118,328.64x = 10,551,256,993.21
  5. Step 5: Solve for x
    x = 10,551,256,993.21/118,328.64
  6. Step 6: Final answer
    x = 89,169.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.