Home / 128,455,734.76-177,269,088.16-69,718,401.72

Finding the Fourth Proportional to 128,455,734.76, 177,269,088.16 and 69,718,401.72

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Solution

The fourth proportional to 128,455,734.76, 177,269,088.16 and 69,718,401.72 is: 96,211,488.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,455,734.76 : 177,269,088.16 = 69,718,401.72 : x
  2. Step 2: Convert to fraction form
    128,455,734.76/177,269,088.16 = 69,718,401.72/x
  3. Step 3: Cross multiply
    128,455,734.76x = 177,269,088.16 × 69,718,401.72
  4. Step 4: Simplify right side
    128,455,734.76x = 12,358,917,500,876,976
  5. Step 5: Solve for x
    x = 12,358,917,500,876,976/128,455,734.76
  6. Step 6: Final answer
    x = 96,211,488.91

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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.