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Finding the Fourth Proportional to 136,912.55, 188,938.42 and 76,482.67

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Solution

The fourth proportional to 136,912.55, 188,938.42 and 76,482.67 is: 105,545.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,912.55 : 188,938.42 = 76,482.67 : x
  2. Step 2: Convert to fraction form
    136,912.55/188,938.42 = 76,482.67/x
  3. Step 3: Cross multiply
    136,912.55x = 188,938.42 × 76,482.67
  4. Step 4: Simplify right side
    136,912.55x = 14,450,514,827.18
  5. Step 5: Solve for x
    x = 14,450,514,827.18/136,912.55
  6. Step 6: Final answer
    x = 105,545.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.