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Finding the Fourth Proportional to 72,491.01, 108,746.40 and 42,110.42

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Solution

The fourth proportional to 72,491.01, 108,746.40 and 42,110.42 is: 63,171.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,491.01 : 108,746.40 = 42,110.42 : x
  2. Step 2: Convert to fraction form
    72,491.01/108,746.40 = 42,110.42/x
  3. Step 3: Cross multiply
    72,491.01x = 108,746.40 × 42,110.42
  4. Step 4: Simplify right side
    72,491.01x = 4,579,355,875.84
  5. Step 5: Solve for x
    x = 4,579,355,875.84/72,491.01
  6. Step 6: Final answer
    x = 63,171.36

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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.