Home / 102,612.64-141,664.38-78,222.16

Finding the Fourth Proportional to 102,612.64, 141,664.38 and 78,222.16

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Solution

The fourth proportional to 102,612.64, 141,664.38 and 78,222.16 is: 107,991.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,612.64 : 141,664.38 = 78,222.16 : x
  2. Step 2: Convert to fraction form
    102,612.64/141,664.38 = 78,222.16/x
  3. Step 3: Cross multiply
    102,612.64x = 141,664.38 × 78,222.16
  4. Step 4: Simplify right side
    102,612.64x = 11,081,293,798.66
  5. Step 5: Solve for x
    x = 11,081,293,798.66/102,612.64
  6. Step 6: Final answer
    x = 107,991.51

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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.