Home / 151,971.86-209,721.41-83,988.81

Finding the Fourth Proportional to 151,971.86, 209,721.41 and 83,988.81

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Solution

The fourth proportional to 151,971.86, 209,721.41 and 83,988.81 is: 115,904.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,971.86 : 209,721.41 = 83,988.81 : x
  2. Step 2: Convert to fraction form
    151,971.86/209,721.41 = 83,988.81/x
  3. Step 3: Cross multiply
    151,971.86x = 209,721.41 × 83,988.81
  4. Step 4: Simplify right side
    151,971.86x = 17,614,251,867.39
  5. Step 5: Solve for x
    x = 17,614,251,867.39/151,971.86
  6. Step 6: Final answer
    x = 115,904.70

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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.