Home / 128,017,851.87-192,018,806.18-78,843,062.56

Finding the Fourth Proportional to 128,017,851.87, 192,018,806.18 and 78,843,062.56

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Solution

The fourth proportional to 128,017,851.87, 192,018,806.18 and 78,843,062.56 is: 118,259,684.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,017,851.87 : 192,018,806.18 = 78,843,062.56 : x
  2. Step 2: Convert to fraction form
    128,017,851.87/192,018,806.18 = 78,843,062.56/x
  3. Step 3: Cross multiply
    128,017,851.87x = 192,018,806.18 × 78,843,062.56
  4. Step 4: Simplify right side
    128,017,851.87x = 15,139,350,748,346,256
  5. Step 5: Solve for x
    x = 15,139,350,748,346,256/128,017,851.87
  6. Step 6: Final answer
    x = 118,259,684.31

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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.