Home / 131,721.30-181,726.47-83,963.70

Finding the Fourth Proportional to 131,721.30, 181,726.47 and 83,963.70

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Solution

The fourth proportional to 131,721.30, 181,726.47 and 83,963.70 is: 115,838.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,721.30 : 181,726.47 = 83,963.70 : x
  2. Step 2: Convert to fraction form
    131,721.30/181,726.47 = 83,963.70/x
  3. Step 3: Cross multiply
    131,721.30x = 181,726.47 × 83,963.70
  4. Step 4: Simplify right side
    131,721.30x = 15,258,426,809.14
  5. Step 5: Solve for x
    x = 15,258,426,809.14/131,721.30
  6. Step 6: Final answer
    x = 115,838.72

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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.