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Finding the Fourth Proportional to 93,458.76, 128,971.08 and 51,018

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Solution

The fourth proportional to 93,458.76, 128,971.08 and 51,018 is: 70,403.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,458.76 : 128,971.08 = 51,018 : x
  2. Step 2: Convert to fraction form
    93,458.76/128,971.08 = 51,018/x
  3. Step 3: Cross multiply
    93,458.76x = 128,971.08 × 51,018
  4. Step 4: Simplify right side
    93,458.76x = 6,579,846,559.44
  5. Step 5: Solve for x
    x = 6,579,846,559.44/93,458.76
  6. Step 6: Final answer
    x = 70,403.74

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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.