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Finding the Fourth Proportional to 86,894.07, 119,926.64 and 55,065.87

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Solution

The fourth proportional to 86,894.07, 119,926.64 and 55,065.87 is: 75,999.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,894.07 : 119,926.64 = 55,065.87 : x
  2. Step 2: Convert to fraction form
    86,894.07/119,926.64 = 55,065.87/x
  3. Step 3: Cross multiply
    86,894.07x = 119,926.64 × 55,065.87
  4. Step 4: Simplify right side
    86,894.07x = 6,603,864,492.45
  5. Step 5: Solve for x
    x = 6,603,864,492.45/86,894.07
  6. Step 6: Final answer
    x = 75,999.02

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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.