Home / 128,017,849.87-192,018,803.19-78,843,060.55

Finding the Fourth Proportional to 128,017,849.87, 192,018,803.19 and 78,843,060.55

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Solution

The fourth proportional to 128,017,849.87, 192,018,803.19 and 78,843,060.55 is: 118,259,681.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,017,849.87 : 192,018,803.19 = 78,843,060.55 : x
  2. Step 2: Convert to fraction form
    128,017,849.87/192,018,803.19 = 78,843,060.55/x
  3. Step 3: Cross multiply
    128,017,849.87x = 192,018,803.19 × 78,843,060.55
  4. Step 4: Simplify right side
    128,017,849.87x = 15,139,350,126,733,534
  5. Step 5: Solve for x
    x = 15,139,350,126,733,534/128,017,849.87
  6. Step 6: Final answer
    x = 118,259,681.31

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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.