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Finding the Fourth Proportional to 93,285.09, 128,751.80 and 64,974.38

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Solution

The fourth proportional to 93,285.09, 128,751.80 and 64,974.38 is: 89,677.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,285.09 : 128,751.80 = 64,974.38 : x
  2. Step 2: Convert to fraction form
    93,285.09/128,751.80 = 64,974.38/x
  3. Step 3: Cross multiply
    93,285.09x = 128,751.80 × 64,974.38
  4. Step 4: Simplify right side
    93,285.09x = 8,365,567,410.25
  5. Step 5: Solve for x
    x = 8,365,567,410.25/93,285.09
  6. Step 6: Final answer
    x = 89,677.43

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1.5x scale

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.