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Finding the Fourth Proportional to 86,191.49, 129,019.92 and 46,650.53

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Solution

The fourth proportional to 86,191.49, 129,019.92 and 46,650.53 is: 69,831.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,191.49 : 129,019.92 = 46,650.53 : x
  2. Step 2: Convert to fraction form
    86,191.49/129,019.92 = 46,650.53/x
  3. Step 3: Cross multiply
    86,191.49x = 129,019.92 × 46,650.53
  4. Step 4: Simplify right side
    86,191.49x = 6,018,847,003.46
  5. Step 5: Solve for x
    x = 6,018,847,003.46/86,191.49
  6. Step 6: Final answer
    x = 69,831.11

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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.