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Finding the Fourth Proportional to 117,621.60, 162,264.90 and 79,368.54

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Solution

The fourth proportional to 117,621.60, 162,264.90 and 79,368.54 is: 109,492.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,621.60 : 162,264.90 = 79,368.54 : x
  2. Step 2: Convert to fraction form
    117,621.60/162,264.90 = 79,368.54/x
  3. Step 3: Cross multiply
    117,621.60x = 162,264.90 × 79,368.54
  4. Step 4: Simplify right side
    117,621.60x = 12,878,728,206.25
  5. Step 5: Solve for x
    x = 12,878,728,206.25/117,621.60
  6. Step 6: Final answer
    x = 109,492.88

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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.