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Finding the Fourth Proportional to 86,764.92, 129,998.85 and 47,349.72

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Solution

The fourth proportional to 86,764.92, 129,998.85 and 47,349.72 is: 70,943.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,764.92 : 129,998.85 = 47,349.72 : x
  2. Step 2: Convert to fraction form
    86,764.92/129,998.85 = 47,349.72/x
  3. Step 3: Cross multiply
    86,764.92x = 129,998.85 × 47,349.72
  4. Step 4: Simplify right side
    86,764.92x = 6,155,409,147.82
  5. Step 5: Solve for x
    x = 6,155,409,147.82/86,764.92
  6. Step 6: Final answer
    x = 70,943.52

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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.