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Finding the Fourth Proportional to 118,683.90, 163,785.71 and 64,968.01

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Solution

The fourth proportional to 118,683.90, 163,785.71 and 64,968.01 is: 89,656.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,683.90 : 163,785.71 = 64,968.01 : x
  2. Step 2: Convert to fraction form
    118,683.90/163,785.71 = 64,968.01/x
  3. Step 3: Cross multiply
    118,683.90x = 163,785.71 × 64,968.01
  4. Step 4: Simplify right side
    118,683.90x = 10,640,831,398.09
  5. Step 5: Solve for x
    x = 10,640,831,398.09/118,683.90
  6. Step 6: Final answer
    x = 89,656.91

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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.