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Finding the Fourth Proportional to 93,172.71, 128,579.90 and 52,887.72

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Solution

The fourth proportional to 93,172.71, 128,579.90 and 52,887.72 is: 72,985.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,172.71 : 128,579.90 = 52,887.72 : x
  2. Step 2: Convert to fraction form
    93,172.71/128,579.90 = 52,887.72/x
  3. Step 3: Cross multiply
    93,172.71x = 128,579.90 × 52,887.72
  4. Step 4: Simplify right side
    93,172.71x = 6,800,297,484.39
  5. Step 5: Solve for x
    x = 6,800,297,484.39/93,172.71
  6. Step 6: Final answer
    x = 72,985.94

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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.