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Finding the Fourth Proportional to 72,969.89, 100,681.22 and 44,288.87

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Solution

The fourth proportional to 72,969.89, 100,681.22 and 44,288.87 is: 61,108.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,969.89 : 100,681.22 = 44,288.87 : x
  2. Step 2: Convert to fraction form
    72,969.89/100,681.22 = 44,288.87/x
  3. Step 3: Cross multiply
    72,969.89x = 100,681.22 × 44,288.87
  4. Step 4: Simplify right side
    72,969.89x = 4,459,057,071.34
  5. Step 5: Solve for x
    x = 4,459,057,071.34/72,969.89
  6. Step 6: Final answer
    x = 61,108.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.