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Finding the Fourth Proportional to 72,902.88, 99,949.84 and 71,574.28

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Solution

The fourth proportional to 72,902.88, 99,949.84 and 71,574.28 is: 98,128.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,902.88 : 99,949.84 = 71,574.28 : x
  2. Step 2: Convert to fraction form
    72,902.88/99,949.84 = 71,574.28/x
  3. Step 3: Cross multiply
    72,902.88x = 99,949.84 × 71,574.28
  4. Step 4: Simplify right side
    72,902.88x = 7,153,837,405.30
  5. Step 5: Solve for x
    x = 7,153,837,405.30/72,902.88
  6. Step 6: Final answer
    x = 98,128.32

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.