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Finding the Fourth Proportional to 78,484.55, 117,661.13 and 36,394.67

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Solution

The fourth proportional to 78,484.55, 117,661.13 and 36,394.67 is: 54,561.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,484.55 : 117,661.13 = 36,394.67 : x
  2. Step 2: Convert to fraction form
    78,484.55/117,661.13 = 36,394.67/x
  3. Step 3: Cross multiply
    78,484.55x = 117,661.13 × 36,394.67
  4. Step 4: Simplify right side
    78,484.55x = 4,282,237,227.90
  5. Step 5: Solve for x
    x = 4,282,237,227.90/78,484.55
  6. Step 6: Final answer
    x = 54,561.53

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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.