Home / 128,881.65-177,852.06-71,523.51

Finding the Fourth Proportional to 128,881.65, 177,852.06 and 71,523.51

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Solution

The fourth proportional to 128,881.65, 177,852.06 and 71,523.51 is: 98,699.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,881.65 : 177,852.06 = 71,523.51 : x
  2. Step 2: Convert to fraction form
    128,881.65/177,852.06 = 71,523.51/x
  3. Step 3: Cross multiply
    128,881.65x = 177,852.06 × 71,523.51
  4. Step 4: Simplify right side
    128,881.65x = 12,720,603,591.93
  5. Step 5: Solve for x
    x = 12,720,603,591.93/128,881.65
  6. Step 6: Final answer
    x = 98,699.88

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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.