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Finding the Fourth Proportional to 239,683,647.54, 359,629,045.22 and 128,889,820.86

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Solution

The fourth proportional to 239,683,647.54, 359,629,045.22 and 128,889,820.86 is: 193,390,428.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,683,647.54 : 359,629,045.22 = 128,889,820.86 : x
  2. Step 2: Convert to fraction form
    239,683,647.54/359,629,045.22 = 128,889,820.86/x
  3. Step 3: Cross multiply
    239,683,647.54x = 359,629,045.22 × 128,889,820.86
  4. Step 4: Simplify right side
    239,683,647.54x = 46,352,523,214,458,640
  5. Step 5: Solve for x
    x = 46,352,523,214,458,640/239,683,647.54
  6. Step 6: Final answer
    x = 193,390,428.13

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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.