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Finding the Fourth Proportional to 128,644,806.40, 180,580,486.40 and 128,644,806.40

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Solution

The fourth proportional to 128,644,806.40, 180,580,486.40 and 128,644,806.40 is: 180,580,486.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,644,806.40 : 180,580,486.40 = 128,644,806.40 : x
  2. Step 2: Convert to fraction form
    128,644,806.40/180,580,486.40 = 128,644,806.40/x
  3. Step 3: Cross multiply
    128,644,806.40x = 180,580,486.40 × 128,644,806.40
  4. Step 4: Simplify right side
    128,644,806.40x = 23,230,741,712,545,836
  5. Step 5: Solve for x
    x = 23,230,741,712,545,836/128,644,806.40
  6. Step 6: Final answer
    x = 180,580,486.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.