Home / 128,949,896.40-193,424,844.60-121,385,403.60

Finding the Fourth Proportional to 128,949,896.40, 193,424,844.60 and 121,385,403.60

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Solution

The fourth proportional to 128,949,896.40, 193,424,844.60 and 121,385,403.60 is: 182,078,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,949,896.40 : 193,424,844.60 = 121,385,403.60 : x
  2. Step 2: Convert to fraction form
    128,949,896.40/193,424,844.60 = 121,385,403.60/x
  3. Step 3: Cross multiply
    128,949,896.40x = 193,424,844.60 × 121,385,403.60
  4. Step 4: Simplify right side
    128,949,896.40x = 23,478,952,828,038,280
  5. Step 5: Solve for x
    x = 23,478,952,828,038,280/128,949,896.40
  6. Step 6: Final answer
    x = 182,078,105.40

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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.