Home / 128,112,139.80-192,168,209.70-122,160,000.60

Finding the Fourth Proportional to 128,112,139.80, 192,168,209.70 and 122,160,000.60

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Solution

The fourth proportional to 128,112,139.80, 192,168,209.70 and 122,160,000.60 is: 183,240,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,112,139.80 : 192,168,209.70 = 122,160,000.60 : x
  2. Step 2: Convert to fraction form
    128,112,139.80/192,168,209.70 = 122,160,000.60/x
  3. Step 3: Cross multiply
    128,112,139.80x = 192,168,209.70 × 122,160,000.60
  4. Step 4: Simplify right side
    128,112,139.80x = 23,475,268,612,252,924
  5. Step 5: Solve for x
    x = 23,475,268,612,252,924/128,112,139.80
  6. Step 6: Final answer
    x = 183,240,000.90

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1.5x scale

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.