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Finding the Fourth Proportional to 72,461.81, 108,717.03 and 28,090.01

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Solution

The fourth proportional to 72,461.81, 108,717.03 and 28,090.01 is: 42,144.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,461.81 : 108,717.03 = 28,090.01 : x
  2. Step 2: Convert to fraction form
    72,461.81/108,717.03 = 28,090.01/x
  3. Step 3: Cross multiply
    72,461.81x = 108,717.03 × 28,090.01
  4. Step 4: Simplify right side
    72,461.81x = 3,053,862,459.87
  5. Step 5: Solve for x
    x = 3,053,862,459.87/72,461.81
  6. Step 6: Final answer
    x = 42,144.44

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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.