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Finding the Fourth Proportional to 86,189.86, 129,017.49 and 46,648.90

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Solution

The fourth proportional to 86,189.86, 129,017.49 and 46,648.90 is: 69,828.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,189.86 : 129,017.49 = 46,648.90 : x
  2. Step 2: Convert to fraction form
    86,189.86/129,017.49 = 46,648.90/x
  3. Step 3: Cross multiply
    86,189.86x = 129,017.49 × 46,648.90
  4. Step 4: Simplify right side
    86,189.86x = 6,018,523,989.26
  5. Step 5: Solve for x
    x = 6,018,523,989.26/86,189.86
  6. Step 6: Final answer
    x = 69,828.68

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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.