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Finding the Fourth Proportional to 128,952,907.80, 193,429,361.70 and 83,036,405.40

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Solution

The fourth proportional to 128,952,907.80, 193,429,361.70 and 83,036,405.40 is: 124,554,608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,952,907.80 : 193,429,361.70 = 83,036,405.40 : x
  2. Step 2: Convert to fraction form
    128,952,907.80/193,429,361.70 = 83,036,405.40/x
  3. Step 3: Cross multiply
    128,952,907.80x = 193,429,361.70 × 83,036,405.40
  4. Step 4: Simplify right side
    128,952,907.80x = 16,061,678,894,384,434
  5. Step 5: Solve for x
    x = 16,061,678,894,384,434/128,952,907.80
  6. Step 6: Final answer
    x = 124,554,608.10

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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.