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Finding the Fourth Proportional to 158,186.66, 236,981.85 and 78,130.91

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Solution

The fourth proportional to 158,186.66, 236,981.85 and 78,130.91 is: 117,049.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,186.66 : 236,981.85 = 78,130.91 : x
  2. Step 2: Convert to fraction form
    158,186.66/236,981.85 = 78,130.91/x
  3. Step 3: Cross multiply
    158,186.66x = 236,981.85 × 78,130.91
  4. Step 4: Simplify right side
    158,186.66x = 18,515,606,409.07
  5. Step 5: Solve for x
    x = 18,515,606,409.07/158,186.66
  6. Step 6: Final answer
    x = 117,049.11

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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.