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Finding the Fourth Proportional to 78,606.51, 117,830.97 and 36,516.18

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Solution

The fourth proportional to 78,606.51, 117,830.97 and 36,516.18 is: 54,737.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,606.51 : 117,830.97 = 36,516.18 : x
  2. Step 2: Convert to fraction form
    78,606.51/117,830.97 = 36,516.18/x
  3. Step 3: Cross multiply
    78,606.51x = 117,830.97 × 36,516.18
  4. Step 4: Simplify right side
    78,606.51x = 4,302,736,910.09
  5. Step 5: Solve for x
    x = 4,302,736,910.09/78,606.51
  6. Step 6: Final answer
    x = 54,737.67

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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.