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Finding the Fourth Proportional to 118,683.79, 163,785.54 and 64,967.87

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Solution

The fourth proportional to 118,683.79, 163,785.54 and 64,967.87 is: 89,656.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,683.79 : 163,785.54 = 64,967.87 : x
  2. Step 2: Convert to fraction form
    118,683.79/163,785.54 = 64,967.87/x
  3. Step 3: Cross multiply
    118,683.79x = 163,785.54 × 64,967.87
  4. Step 4: Simplify right side
    118,683.79x = 10,640,797,670.60
  5. Step 5: Solve for x
    x = 10,640,797,670.60/118,683.79
  6. Step 6: Final answer
    x = 89,656.71

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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.