Home / 128,988,312.46-178,019,895.78-73,251,636.56

Finding the Fourth Proportional to 128,988,312.46, 178,019,895.78 and 73,251,636.56

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Solution

The fourth proportional to 128,988,312.46, 178,019,895.78 and 73,251,636.56 is: 101,096,358.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,988,312.46 : 178,019,895.78 = 73,251,636.56 : x
  2. Step 2: Convert to fraction form
    128,988,312.46/178,019,895.78 = 73,251,636.56/x
  3. Step 3: Cross multiply
    128,988,312.46x = 178,019,895.78 × 73,251,636.56
  4. Step 4: Simplify right side
    128,988,312.46x = 13,040,248,706,125,638
  5. Step 5: Solve for x
    x = 13,040,248,706,125,638/128,988,312.46
  6. Step 6: Final answer
    x = 101,096,358.71

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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.