Home / 128,430,665.82-177,234,800.58-69,693,343.11

Finding the Fourth Proportional to 128,430,665.82, 177,234,800.58 and 69,693,343.11

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Solution

The fourth proportional to 128,430,665.82, 177,234,800.58 and 69,693,343.11 is: 96,177,074.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,430,665.82 : 177,234,800.58 = 69,693,343.11 : x
  2. Step 2: Convert to fraction form
    128,430,665.82/177,234,800.58 = 69,693,343.11/x
  3. Step 3: Cross multiply
    128,430,665.82x = 177,234,800.58 × 69,693,343.11
  4. Step 4: Simplify right side
    128,430,665.82x = 12,352,085,767,854,368
  5. Step 5: Solve for x
    x = 12,352,085,767,854,368/128,430,665.82
  6. Step 6: Final answer
    x = 96,177,074.91

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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.