Home / 427,290,102.55-640,845,471.99-120,510,470.89

Finding the Fourth Proportional to 427,290,102.55, 640,845,471.99 and 120,510,470.89

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Solution

The fourth proportional to 427,290,102.55, 640,845,471.99 and 120,510,470.89 is: 180,740,412.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,290,102.55 : 640,845,471.99 = 120,510,470.89 : x
  2. Step 2: Convert to fraction form
    427,290,102.55/640,845,471.99 = 120,510,470.89/x
  3. Step 3: Cross multiply
    427,290,102.55x = 640,845,471.99 × 120,510,470.89
  4. Step 4: Simplify right side
    427,290,102.55x = 77,228,589,598,492,176
  5. Step 5: Solve for x
    x = 77,228,589,598,492,176/427,290,102.55
  6. Step 6: Final answer
    x = 180,740,412.98

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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.