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Finding the Fourth Proportional to 72,508.56, 108,762.84 and 19,918.32

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Solution

The fourth proportional to 72,508.56, 108,762.84 and 19,918.32 is: 29,877.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,508.56 : 108,762.84 = 19,918.32 : x
  2. Step 2: Convert to fraction form
    72,508.56/108,762.84 = 19,918.32/x
  3. Step 3: Cross multiply
    72,508.56x = 108,762.84 × 19,918.32
  4. Step 4: Simplify right side
    72,508.56x = 2,166,373,051.23
  5. Step 5: Solve for x
    x = 2,166,373,051.23/72,508.56
  6. Step 6: Final answer
    x = 29,877.48

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1.5x scale

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.