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Finding the Fourth Proportional to 79,490, 109,696.20 and 45,958.16

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Solution

The fourth proportional to 79,490, 109,696.20 and 45,958.16 is: 63,422.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,490 : 109,696.20 = 45,958.16 : x
  2. Step 2: Convert to fraction form
    79,490/109,696.20 = 45,958.16/x
  3. Step 3: Cross multiply
    79,490x = 109,696.20 × 45,958.16
  4. Step 4: Simplify right side
    79,490x = 5,041,435,510.99
  5. Step 5: Solve for x
    x = 5,041,435,510.99/79,490
  6. Step 6: Final answer
    x = 63,422.26

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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.