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Finding the Fourth Proportional to 93,415, 128,912.70 and 59,881

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Solution

The fourth proportional to 93,415, 128,912.70 and 59,881 is: 82,635.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,415 : 128,912.70 = 59,881 : x
  2. Step 2: Convert to fraction form
    93,415/128,912.70 = 59,881/x
  3. Step 3: Cross multiply
    93,415x = 128,912.70 × 59,881
  4. Step 4: Simplify right side
    93,415x = 7,719,421,388.70
  5. Step 5: Solve for x
    x = 7,719,421,388.70/93,415
  6. Step 6: Final answer
    x = 82,635.78

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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.