Home / 128,611,428.84-177,485,785.38-69,875,257.32

Finding the Fourth Proportional to 128,611,428.84, 177,485,785.38 and 69,875,257.32

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Solution

The fourth proportional to 128,611,428.84, 177,485,785.38 and 69,875,257.32 is: 96,428,949.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,611,428.84 : 177,485,785.38 = 69,875,257.32 : x
  2. Step 2: Convert to fraction form
    128,611,428.84/177,485,785.38 = 69,875,257.32/x
  3. Step 3: Cross multiply
    128,611,428.84x = 177,485,785.38 × 69,875,257.32
  4. Step 4: Simplify right side
    128,611,428.84x = 12,401,864,924,069,792
  5. Step 5: Solve for x
    x = 12,401,864,924,069,792/128,611,428.84
  6. Step 6: Final answer
    x = 96,428,949.09

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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.