Home / 129,054.87-178,076.48-72,455.31

Finding the Fourth Proportional to 129,054.87, 178,076.48 and 72,455.31

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Solution

The fourth proportional to 129,054.87, 178,076.48 and 72,455.31 is: 99,977.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,054.87 : 178,076.48 = 72,455.31 : x
  2. Step 2: Convert to fraction form
    129,054.87/178,076.48 = 72,455.31/x
  3. Step 3: Cross multiply
    129,054.87x = 178,076.48 × 72,455.31
  4. Step 4: Simplify right side
    129,054.87x = 12,902,586,199.83
  5. Step 5: Solve for x
    x = 12,902,586,199.83/129,054.87
  6. Step 6: Final answer
    x = 99,977.52

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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.