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Finding the Fourth Proportional to 72,901.88, 108,953.36 and 53,221.88

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Solution

The fourth proportional to 72,901.88, 108,953.36 and 53,221.88 is: 79,541.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,901.88 : 108,953.36 = 53,221.88 : x
  2. Step 2: Convert to fraction form
    72,901.88/108,953.36 = 53,221.88/x
  3. Step 3: Cross multiply
    72,901.88x = 108,953.36 × 53,221.88
  4. Step 4: Simplify right side
    72,901.88x = 5,798,702,651.52
  5. Step 5: Solve for x
    x = 5,798,702,651.52/72,901.88
  6. Step 6: Final answer
    x = 79,541.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.