Home / 76,731.57-115,097.36-72,400.05

Finding the Fourth Proportional to 76,731.57, 115,097.36 and 72,400.05

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Solution

The fourth proportional to 76,731.57, 115,097.36 and 72,400.05 is: 108,600.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,731.57 : 115,097.36 = 72,400.05 : x
  2. Step 2: Convert to fraction form
    76,731.57/115,097.36 = 72,400.05/x
  3. Step 3: Cross multiply
    76,731.57x = 115,097.36 × 72,400.05
  4. Step 4: Simplify right side
    76,731.57x = 8,333,054,256.87
  5. Step 5: Solve for x
    x = 8,333,054,256.87/76,731.57
  6. Step 6: Final answer
    x = 108,600.08

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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.