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Finding the Fourth Proportional to 86,769.90, 130,006.29 and 47,354.67

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Solution

The fourth proportional to 86,769.90, 130,006.29 and 47,354.67 is: 70,950.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,769.90 : 130,006.29 = 47,354.67 : x
  2. Step 2: Convert to fraction form
    86,769.90/130,006.29 = 47,354.67/x
  3. Step 3: Cross multiply
    86,769.90x = 130,006.29 × 47,354.67
  4. Step 4: Simplify right side
    86,769.90x = 6,156,404,960.87
  5. Step 5: Solve for x
    x = 6,156,404,960.87/86,769.90
  6. Step 6: Final answer
    x = 70,950.93

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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.