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Finding the Fourth Proportional to 86,396.89, 129,612.95 and 48,973.67

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Solution

The fourth proportional to 86,396.89, 129,612.95 and 48,973.67 is: 73,470.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,396.89 : 129,612.95 = 48,973.67 : x
  2. Step 2: Convert to fraction form
    86,396.89/129,612.95 = 48,973.67/x
  3. Step 3: Cross multiply
    86,396.89x = 129,612.95 × 48,973.67
  4. Step 4: Simplify right side
    86,396.89x = 6,347,621,841.03
  5. Step 5: Solve for x
    x = 6,347,621,841.03/86,396.89
  6. Step 6: Final answer
    x = 73,470.49

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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.