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Finding the Fourth Proportional to 93,306, 128,808.25 and 64,647.39

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Solution

The fourth proportional to 93,306, 128,808.25 and 64,647.39 is: 89,245.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,306 : 128,808.25 = 64,647.39 : x
  2. Step 2: Convert to fraction form
    93,306/128,808.25 = 64,647.39/x
  3. Step 3: Cross multiply
    93,306x = 128,808.25 × 64,647.39
  4. Step 4: Simplify right side
    93,306x = 8,327,117,172.97
  5. Step 5: Solve for x
    x = 8,327,117,172.97/93,306
  6. Step 6: Final answer
    x = 89,245.25

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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.