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Finding the Fourth Proportional to 118,672.66, 163,768.45 and 64,961.08

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Solution

The fourth proportional to 118,672.66, 163,768.45 and 64,961.08 is: 89,646.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,672.66 : 163,768.45 = 64,961.08 : x
  2. Step 2: Convert to fraction form
    118,672.66/163,768.45 = 64,961.08/x
  3. Step 3: Cross multiply
    118,672.66x = 163,768.45 × 64,961.08
  4. Step 4: Simplify right side
    118,672.66x = 10,638,574,931.90
  5. Step 5: Solve for x
    x = 10,638,574,931.90/118,672.66
  6. Step 6: Final answer
    x = 89,646.38

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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.