Home / 128,725,074.80-193,087,612.20-74,305,516.40

Finding the Fourth Proportional to 128,725,074.80, 193,087,612.20 and 74,305,516.40

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Solution

The fourth proportional to 128,725,074.80, 193,087,612.20 and 74,305,516.40 is: 111,458,274.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,725,074.80 : 193,087,612.20 = 74,305,516.40 : x
  2. Step 2: Convert to fraction form
    128,725,074.80/193,087,612.20 = 74,305,516.40/x
  3. Step 3: Cross multiply
    128,725,074.80x = 193,087,612.20 × 74,305,516.40
  4. Step 4: Simplify right side
    128,725,074.80x = 14,347,474,734,963,940
  5. Step 5: Solve for x
    x = 14,347,474,734,963,940/128,725,074.80
  6. Step 6: Final answer
    x = 111,458,274.60

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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.