Home / 128,946.24-177,956.40-71,589.06

Finding the Fourth Proportional to 128,946.24, 177,956.40 and 71,589.06

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Solution

The fourth proportional to 128,946.24, 177,956.40 and 71,589.06 is: 98,798.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,946.24 : 177,956.40 = 71,589.06 : x
  2. Step 2: Convert to fraction form
    128,946.24/177,956.40 = 71,589.06/x
  3. Step 3: Cross multiply
    128,946.24x = 177,956.40 × 71,589.06
  4. Step 4: Simplify right side
    128,946.24x = 12,739,731,396.98
  5. Step 5: Solve for x
    x = 12,739,731,396.98/128,946.24
  6. Step 6: Final answer
    x = 98,798.78

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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.