Home / 130,143.70-195,214.20-66,981.52

Finding the Fourth Proportional to 130,143.70, 195,214.20 and 66,981.52

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Solution

The fourth proportional to 130,143.70, 195,214.20 and 66,981.52 is: 100,471.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,143.70 : 195,214.20 = 66,981.52 : x
  2. Step 2: Convert to fraction form
    130,143.70/195,214.20 = 66,981.52/x
  3. Step 3: Cross multiply
    130,143.70x = 195,214.20 × 66,981.52
  4. Step 4: Simplify right side
    130,143.70x = 13,075,743,841.58
  5. Step 5: Solve for x
    x = 13,075,743,841.58/130,143.70
  6. Step 6: Final answer
    x = 100,471.59

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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.