Home / 131,880.72-181,963.80-78,156.48

Finding the Fourth Proportional to 131,880.72, 181,963.80 and 78,156.48

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Solution

The fourth proportional to 131,880.72, 181,963.80 and 78,156.48 is: 107,837.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,880.72 : 181,963.80 = 78,156.48 : x
  2. Step 2: Convert to fraction form
    131,880.72/181,963.80 = 78,156.48/x
  3. Step 3: Cross multiply
    131,880.72x = 181,963.80 × 78,156.48
  4. Step 4: Simplify right side
    131,880.72x = 14,221,650,095.42
  5. Step 5: Solve for x
    x = 14,221,650,095.42/131,880.72
  6. Step 6: Final answer
    x = 107,837.22

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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.