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Finding the Fourth Proportional to 80,919,365.60, 121,379,048.40 and 80,415,480.80

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Solution

The fourth proportional to 80,919,365.60, 121,379,048.40 and 80,415,480.80 is: 120,623,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,919,365.60 : 121,379,048.40 = 80,415,480.80 : x
  2. Step 2: Convert to fraction form
    80,919,365.60/121,379,048.40 = 80,415,480.80/x
  3. Step 3: Cross multiply
    80,919,365.60x = 121,379,048.40 × 80,415,480.80
  4. Step 4: Simplify right side
    80,919,365.60x = 9,760,754,536,132,470
  5. Step 5: Solve for x
    x = 9,760,754,536,132,470/80,919,365.60
  6. Step 6: Final answer
    x = 120,623,221.20

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1.5x scale

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.