Home / 128,391,356.69-177,180,415.66-69,654,021.81

Finding the Fourth Proportional to 128,391,356.69, 177,180,415.66 and 69,654,021.81

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Solution

The fourth proportional to 128,391,356.69, 177,180,415.66 and 69,654,021.81 is: 96,122,736.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,391,356.69 : 177,180,415.66 = 69,654,021.81 : x
  2. Step 2: Convert to fraction form
    128,391,356.69/177,180,415.66 = 69,654,021.81/x
  3. Step 3: Cross multiply
    128,391,356.69x = 177,180,415.66 × 69,654,021.81
  4. Step 4: Simplify right side
    128,391,356.69x = 12,341,328,536,686,506
  5. Step 5: Solve for x
    x = 12,341,328,536,686,506/128,391,356.69
  6. Step 6: Final answer
    x = 96,122,736.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.