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Finding the Fourth Proportional to 72,345.45, 108,638.60 and 48,804.51

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Solution

The fourth proportional to 72,345.45, 108,638.60 and 48,804.51 is: 73,288.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,345.45 : 108,638.60 = 48,804.51 : x
  2. Step 2: Convert to fraction form
    72,345.45/108,638.60 = 48,804.51/x
  3. Step 3: Cross multiply
    72,345.45x = 108,638.60 × 48,804.51
  4. Step 4: Simplify right side
    72,345.45x = 5,302,053,396.06
  5. Step 5: Solve for x
    x = 5,302,053,396.06/72,345.45
  6. Step 6: Final answer
    x = 73,288.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.