Home / 78,146.06-117,219.10-18,981.34

Finding the Fourth Proportional to 78,146.06, 117,219.10 and 18,981.34

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Solution

The fourth proportional to 78,146.06, 117,219.10 and 18,981.34 is: 28,472.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,146.06 : 117,219.10 = 18,981.34 : x
  2. Step 2: Convert to fraction form
    78,146.06/117,219.10 = 18,981.34/x
  3. Step 3: Cross multiply
    78,146.06x = 117,219.10 × 18,981.34
  4. Step 4: Simplify right side
    78,146.06x = 2,224,975,251.09
  5. Step 5: Solve for x
    x = 2,224,975,251.09/78,146.06
  6. Step 6: Final answer
    x = 28,472.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.