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Finding the Fourth Proportional to 86,218.73, 118,980.70 and 48,492.98

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Solution

The fourth proportional to 86,218.73, 118,980.70 and 48,492.98 is: 66,919.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,218.73 : 118,980.70 = 48,492.98 : x
  2. Step 2: Convert to fraction form
    86,218.73/118,980.70 = 48,492.98/x
  3. Step 3: Cross multiply
    86,218.73x = 118,980.70 × 48,492.98
  4. Step 4: Simplify right side
    86,218.73x = 5,769,728,881.71
  5. Step 5: Solve for x
    x = 5,769,728,881.71/86,218.73
  6. Step 6: Final answer
    x = 66,919.67

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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.