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Finding the Fourth Proportional to 93,172.71, 128,578.65 and 50,731.50

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Solution

The fourth proportional to 93,172.71, 128,578.65 and 50,731.50 is: 70,009.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,172.71 : 128,578.65 = 50,731.50 : x
  2. Step 2: Convert to fraction form
    93,172.71/128,578.65 = 50,731.50/x
  3. Step 3: Cross multiply
    93,172.71x = 128,578.65 × 50,731.50
  4. Step 4: Simplify right side
    93,172.71x = 6,522,987,782.48
  5. Step 5: Solve for x
    x = 6,522,987,782.48/93,172.71
  6. Step 6: Final answer
    x = 70,009.64

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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.