Home / 128,303.17-177,063.78-71,714.50

Finding the Fourth Proportional to 128,303.17, 177,063.78 and 71,714.50

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Solution

The fourth proportional to 128,303.17, 177,063.78 and 71,714.50 is: 98,969.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,303.17 : 177,063.78 = 71,714.50 : x
  2. Step 2: Convert to fraction form
    128,303.17/177,063.78 = 71,714.50/x
  3. Step 3: Cross multiply
    128,303.17x = 177,063.78 × 71,714.50
  4. Step 4: Simplify right side
    128,303.17x = 12,698,040,450.81
  5. Step 5: Solve for x
    x = 12,698,040,450.81/128,303.17
  6. Step 6: Final answer
    x = 98,969.03

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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.