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Finding the Fourth Proportional to 72,409.51, 108,614.05 and 18,374.09

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Solution

The fourth proportional to 72,409.51, 108,614.05 and 18,374.09 is: 27,561.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,409.51 : 108,614.05 = 18,374.09 : x
  2. Step 2: Convert to fraction form
    72,409.51/108,614.05 = 18,374.09/x
  3. Step 3: Cross multiply
    72,409.51x = 108,614.05 × 18,374.09
  4. Step 4: Simplify right side
    72,409.51x = 1,995,683,695.02
  5. Step 5: Solve for x
    x = 1,995,683,695.02/72,409.51
  6. Step 6: Final answer
    x = 27,561.07

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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.