Home / 415,872,469.60-623,867,686.80-128,628,181.60

Finding the Fourth Proportional to 415,872,469.60, 623,867,686.80 and 128,628,181.60

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Solution

The fourth proportional to 415,872,469.60, 623,867,686.80 and 128,628,181.60 is: 192,960,515.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,872,469.60 : 623,867,686.80 = 128,628,181.60 : x
  2. Step 2: Convert to fraction form
    415,872,469.60/623,867,686.80 = 128,628,181.60/x
  3. Step 3: Cross multiply
    415,872,469.60x = 623,867,686.80 × 128,628,181.60
  4. Step 4: Simplify right side
    415,872,469.60x = 80,246,966,112,082,320
  5. Step 5: Solve for x
    x = 80,246,966,112,082,320/415,872,469.60
  6. Step 6: Final answer
    x = 192,960,515.49

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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.