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Finding the Fourth Proportional to 86,394.89, 129,609.95 and 48,971.67

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Solution

The fourth proportional to 86,394.89, 129,609.95 and 48,971.67 is: 73,467.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,394.89 : 129,609.95 = 48,971.67 : x
  2. Step 2: Convert to fraction form
    86,394.89/129,609.95 = 48,971.67/x
  3. Step 3: Cross multiply
    86,394.89x = 129,609.95 × 48,971.67
  4. Step 4: Simplify right side
    86,394.89x = 6,347,215,455.26
  5. Step 5: Solve for x
    x = 6,347,215,455.26/86,394.89
  6. Step 6: Final answer
    x = 73,467.49

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1.5x scale

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.