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Finding the Fourth Proportional to 72,580.43, 108,877.49 and 28,210.58

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Solution

The fourth proportional to 72,580.43, 108,877.49 and 28,210.58 is: 42,318.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,580.43 : 108,877.49 = 28,210.58 : x
  2. Step 2: Convert to fraction form
    72,580.43/108,877.49 = 28,210.58/x
  3. Step 3: Cross multiply
    72,580.43x = 108,877.49 × 28,210.58
  4. Step 4: Simplify right side
    72,580.43x = 3,071,497,141.84
  5. Step 5: Solve for x
    x = 3,071,497,141.84/72,580.43
  6. Step 6: Final answer
    x = 42,318.53

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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.