Home / 128,328,008.20-192,492,012.30-99,662,561.80

Finding the Fourth Proportional to 128,328,008.20, 192,492,012.30 and 99,662,561.80

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Solution

The fourth proportional to 128,328,008.20, 192,492,012.30 and 99,662,561.80 is: 149,493,842.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,328,008.20 : 192,492,012.30 = 99,662,561.80 : x
  2. Step 2: Convert to fraction form
    128,328,008.20/192,492,012.30 = 99,662,561.80/x
  3. Step 3: Cross multiply
    128,328,008.20x = 192,492,012.30 × 99,662,561.80
  4. Step 4: Simplify right side
    128,328,008.20x = 19,184,247,071,855,112
  5. Step 5: Solve for x
    x = 19,184,247,071,855,112/128,328,008.20
  6. Step 6: Final answer
    x = 149,493,842.70

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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.