Home / 128,017,851.37-192,018,805.44-78,843,062.06

Finding the Fourth Proportional to 128,017,851.37, 192,018,805.44 and 78,843,062.06

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Solution

The fourth proportional to 128,017,851.37, 192,018,805.44 and 78,843,062.06 is: 118,259,683.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,017,851.37 : 192,018,805.44 = 78,843,062.06 : x
  2. Step 2: Convert to fraction form
    128,017,851.37/192,018,805.44 = 78,843,062.06/x
  3. Step 3: Cross multiply
    128,017,851.37x = 192,018,805.44 × 78,843,062.06
  4. Step 4: Simplify right side
    128,017,851.37x = 15,139,350,592,638,678
  5. Step 5: Solve for x
    x = 15,139,350,592,638,678/128,017,851.37
  6. Step 6: Final answer
    x = 118,259,683.56

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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.