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Finding the Fourth Proportional to 86,770.90, 130,007.79 and 47,355.67

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Solution

The fourth proportional to 86,770.90, 130,007.79 and 47,355.67 is: 70,952.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,770.90 : 130,007.79 = 47,355.67 : x
  2. Step 2: Convert to fraction form
    86,770.90/130,007.79 = 47,355.67/x
  3. Step 3: Cross multiply
    86,770.90x = 130,007.79 × 47,355.67
  4. Step 4: Simplify right side
    86,770.90x = 6,156,606,000.67
  5. Step 5: Solve for x
    x = 6,156,606,000.67/86,770.90
  6. Step 6: Final answer
    x = 70,952.43

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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.