Home / 128,304,075.80-192,078,200.10-120,829,784.60

Finding the Fourth Proportional to 128,304,075.80, 192,078,200.10 and 120,829,784.60

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Solution

The fourth proportional to 128,304,075.80, 192,078,200.10 and 120,829,784.60 is: 180,888,778.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,075.80 : 192,078,200.10 = 120,829,784.60 : x
  2. Step 2: Convert to fraction form
    128,304,075.80/192,078,200.10 = 120,829,784.60/x
  3. Step 3: Cross multiply
    128,304,075.80x = 192,078,200.10 × 120,829,784.60
  4. Step 4: Simplify right side
    128,304,075.80x = 23,208,767,544,438,696
  5. Step 5: Solve for x
    x = 23,208,767,544,438,696/128,304,075.80
  6. Step 6: Final answer
    x = 180,888,778.47

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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.