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Finding the Fourth Proportional to 93,121.21, 128,509.95 and 50,682.43

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Solution

The fourth proportional to 93,121.21, 128,509.95 and 50,682.43 is: 69,943.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,121.21 : 128,509.95 = 50,682.43 : x
  2. Step 2: Convert to fraction form
    93,121.21/128,509.95 = 50,682.43/x
  3. Step 3: Cross multiply
    93,121.21x = 128,509.95 × 50,682.43
  4. Step 4: Simplify right side
    93,121.21x = 6,513,196,545.18
  5. Step 5: Solve for x
    x = 6,513,196,545.18/93,121.21
  6. Step 6: Final answer
    x = 69,943.21

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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.