Home / 80,858,085.80-121,287,128.70-66,509,178.80

Finding the Fourth Proportional to 80,858,085.80, 121,287,128.70 and 66,509,178.80

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Solution

The fourth proportional to 80,858,085.80, 121,287,128.70 and 66,509,178.80 is: 99,763,768.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,858,085.80 : 121,287,128.70 = 66,509,178.80 : x
  2. Step 2: Convert to fraction form
    80,858,085.80/121,287,128.70 = 66,509,178.80/x
  3. Step 3: Cross multiply
    80,858,085.80x = 121,287,128.70 × 66,509,178.80
  4. Step 4: Simplify right side
    80,858,085.80x = 8,066,707,328,846,911
  5. Step 5: Solve for x
    x = 8,066,707,328,846,911/80,858,085.80
  6. Step 6: Final answer
    x = 99,763,768.20

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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.