Home / 128,021.51-191,970.91-60,497.34

Finding the Fourth Proportional to 128,021.51, 191,970.91 and 60,497.34

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Solution

The fourth proportional to 128,021.51, 191,970.91 and 60,497.34 is: 90,717.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,021.51 : 191,970.91 = 60,497.34 : x
  2. Step 2: Convert to fraction form
    128,021.51/191,970.91 = 60,497.34/x
  3. Step 3: Cross multiply
    128,021.51x = 191,970.91 × 60,497.34
  4. Step 4: Simplify right side
    128,021.51x = 11,613,729,412.38
  5. Step 5: Solve for x
    x = 11,613,729,412.38/128,021.51
  6. Step 6: Final answer
    x = 90,717.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.