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Finding the Fourth Proportional to 129,055.77, 178,024.79 and 81,226.08

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Solution

The fourth proportional to 129,055.77, 178,024.79 and 81,226.08 is: 112,046.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,055.77 : 178,024.79 = 81,226.08 : x
  2. Step 2: Convert to fraction form
    129,055.77/178,024.79 = 81,226.08/x
  3. Step 3: Cross multiply
    129,055.77x = 178,024.79 × 81,226.08
  4. Step 4: Simplify right side
    129,055.77x = 14,460,255,428.39
  5. Step 5: Solve for x
    x = 14,460,255,428.39/129,055.77
  6. Step 6: Final answer
    x = 112,046.56

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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.