Home / 76,921.78-106,152-43,387.78

Finding the Fourth Proportional to 76,921.78, 106,152 and 43,387.78

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Solution

The fourth proportional to 76,921.78, 106,152 and 43,387.78 is: 59,875.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,921.78 : 106,152 = 43,387.78 : x
  2. Step 2: Convert to fraction form
    76,921.78/106,152 = 43,387.78/x
  3. Step 3: Cross multiply
    76,921.78x = 106,152 × 43,387.78
  4. Step 4: Simplify right side
    76,921.78x = 4,605,699,622.56
  5. Step 5: Solve for x
    x = 4,605,699,622.56/76,921.78
  6. Step 6: Final answer
    x = 59,875.10

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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.