Home / 128,303,381.80-192,510,368.70-74,496,687.40

Finding the Fourth Proportional to 128,303,381.80, 192,510,368.70 and 74,496,687.40

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Solution

The fourth proportional to 128,303,381.80, 192,510,368.70 and 74,496,687.40 is: 111,777,137.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,303,381.80 : 192,510,368.70 = 74,496,687.40 : x
  2. Step 2: Convert to fraction form
    128,303,381.80/192,510,368.70 = 74,496,687.40/x
  3. Step 3: Cross multiply
    128,303,381.80x = 192,510,368.70 × 74,496,687.40
  4. Step 4: Simplify right side
    128,303,381.80x = 14,341,384,758,302,644
  5. Step 5: Solve for x
    x = 14,341,384,758,302,644/128,303,381.80
  6. Step 6: Final answer
    x = 111,777,137.57

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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.