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Finding the Fourth Proportional to 86,394.39, 129,609.20 and 48,971.17

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Solution

The fourth proportional to 86,394.39, 129,609.20 and 48,971.17 is: 73,466.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,394.39 : 129,609.20 = 48,971.17 : x
  2. Step 2: Convert to fraction form
    86,394.39/129,609.20 = 48,971.17/x
  3. Step 3: Cross multiply
    86,394.39x = 129,609.20 × 48,971.17
  4. Step 4: Simplify right side
    86,394.39x = 6,347,114,166.76
  5. Step 5: Solve for x
    x = 6,347,114,166.76/86,394.39
  6. Step 6: Final answer
    x = 73,466.74

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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.