Home / 128,776.14-177,721.83-71,433.45

Finding the Fourth Proportional to 128,776.14, 177,721.83 and 71,433.45

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Solution

The fourth proportional to 128,776.14, 177,721.83 and 71,433.45 is: 98,584.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,776.14 : 177,721.83 = 71,433.45 : x
  2. Step 2: Convert to fraction form
    128,776.14/177,721.83 = 71,433.45/x
  3. Step 3: Cross multiply
    128,776.14x = 177,721.83 × 71,433.45
  4. Step 4: Simplify right side
    128,776.14x = 12,695,283,457.21
  5. Step 5: Solve for x
    x = 12,695,283,457.21/128,776.14
  6. Step 6: Final answer
    x = 98,584.13

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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.