Home / 131,881.72-181,965.18-78,157.48

Finding the Fourth Proportional to 131,881.72, 181,965.18 and 78,157.48

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Solution

The fourth proportional to 131,881.72, 181,965.18 and 78,157.48 is: 107,838.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,881.72 : 181,965.18 = 78,157.48 : x
  2. Step 2: Convert to fraction form
    131,881.72/181,965.18 = 78,157.48/x
  3. Step 3: Cross multiply
    131,881.72x = 181,965.18 × 78,157.48
  4. Step 4: Simplify right side
    131,881.72x = 14,221,939,916.55
  5. Step 5: Solve for x
    x = 14,221,939,916.55/131,881.72
  6. Step 6: Final answer
    x = 107,838.60

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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.