Home / 85,343,468.79-128,015,535.33-20,647,170.06

Finding the Fourth Proportional to 85,343,468.79, 128,015,535.33 and 20,647,170.06

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Solution

The fourth proportional to 85,343,468.79, 128,015,535.33 and 20,647,170.06 is: 30,970,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,343,468.79 : 128,015,535.33 = 20,647,170.06 : x
  2. Step 2: Convert to fraction form
    85,343,468.79/128,015,535.33 = 20,647,170.06/x
  3. Step 3: Cross multiply
    85,343,468.79x = 128,015,535.33 × 20,647,170.06
  4. Step 4: Simplify right side
    85,343,468.79x = 2,643,158,528,280,448
  5. Step 5: Solve for x
    x = 2,643,158,528,280,448/85,343,468.79
  6. Step 6: Final answer
    x = 30,970,835.45

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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.