Home / 128,051,399.42-192,064,172.43-86,817,033.70

Finding the Fourth Proportional to 128,051,399.42, 192,064,172.43 and 86,817,033.70

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Solution

The fourth proportional to 128,051,399.42, 192,064,172.43 and 86,817,033.70 is: 130,216,786.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,051,399.42 : 192,064,172.43 = 86,817,033.70 : x
  2. Step 2: Convert to fraction form
    128,051,399.42/192,064,172.43 = 86,817,033.70/x
  3. Step 3: Cross multiply
    128,051,399.42x = 192,064,172.43 × 86,817,033.70
  4. Step 4: Simplify right side
    128,051,399.42x = 16,674,441,730,417,922
  5. Step 5: Solve for x
    x = 16,674,441,730,417,922/128,051,399.42
  6. Step 6: Final answer
    x = 130,216,786.43

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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.