Home / 128,755,890.61-177,680,665.60-70,809,138.61

Finding the Fourth Proportional to 128,755,890.61, 177,680,665.60 and 70,809,138.61

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Solution

The fourth proportional to 128,755,890.61, 177,680,665.60 and 70,809,138.61 is: 97,715,256.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,755,890.61 : 177,680,665.60 = 70,809,138.61 : x
  2. Step 2: Convert to fraction form
    128,755,890.61/177,680,665.60 = 70,809,138.61/x
  3. Step 3: Cross multiply
    128,755,890.61x = 177,680,665.60 × 70,809,138.61
  4. Step 4: Simplify right side
    128,755,890.61x = 12,581,414,878,787,458
  5. Step 5: Solve for x
    x = 12,581,414,878,787,458/128,755,890.61
  6. Step 6: Final answer
    x = 97,715,256.52

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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.