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Finding the Fourth Proportional to 81,978.48, 113,129.19 and 46,168.92

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Solution

The fourth proportional to 81,978.48, 113,129.19 and 46,168.92 is: 63,712.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,978.48 : 113,129.19 = 46,168.92 : x
  2. Step 2: Convert to fraction form
    81,978.48/113,129.19 = 46,168.92/x
  3. Step 3: Cross multiply
    81,978.48x = 113,129.19 × 46,168.92
  4. Step 4: Simplify right side
    81,978.48x = 5,223,052,522.77
  5. Step 5: Solve for x
    x = 5,223,052,522.77/81,978.48
  6. Step 6: Final answer
    x = 63,712.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.