Home / 315,039,427.20-472,559,140.80-85,008,142.80

Finding the Fourth Proportional to 315,039,427.20, 472,559,140.80 and 85,008,142.80

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Solution

The fourth proportional to 315,039,427.20, 472,559,140.80 and 85,008,142.80 is: 127,512,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,039,427.20 : 472,559,140.80 = 85,008,142.80 : x
  2. Step 2: Convert to fraction form
    315,039,427.20/472,559,140.80 = 85,008,142.80/x
  3. Step 3: Cross multiply
    315,039,427.20x = 472,559,140.80 × 85,008,142.80
  4. Step 4: Simplify right side
    315,039,427.20x = 40,171,374,922,571,704
  5. Step 5: Solve for x
    x = 40,171,374,922,571,704/315,039,427.20
  6. Step 6: Final answer
    x = 127,512,214.20

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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.