Home / 128,928,087.77-177,921,837.63-70,191,161.73

Finding the Fourth Proportional to 128,928,087.77, 177,921,837.63 and 70,191,161.73

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Solution

The fourth proportional to 128,928,087.77, 177,921,837.63 and 70,191,161.73 is: 96,864,389.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,928,087.77 : 177,921,837.63 = 70,191,161.73 : x
  2. Step 2: Convert to fraction form
    128,928,087.77/177,921,837.63 = 70,191,161.73/x
  3. Step 3: Cross multiply
    128,928,087.77x = 177,921,837.63 × 70,191,161.73
  4. Step 4: Simplify right side
    128,928,087.77x = 12,488,540,480,386,130
  5. Step 5: Solve for x
    x = 12,488,540,480,386,130/128,928,087.77
  6. Step 6: Final answer
    x = 96,864,389.26

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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.