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Finding the Fourth Proportional to 225,086.85, 310,646.64 and 129,612.15

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Solution

The fourth proportional to 225,086.85, 310,646.64 and 129,612.15 is: 178,880.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,086.85 : 310,646.64 = 129,612.15 : x
  2. Step 2: Convert to fraction form
    225,086.85/310,646.64 = 129,612.15/x
  3. Step 3: Cross multiply
    225,086.85x = 310,646.64 × 129,612.15
  4. Step 4: Simplify right side
    225,086.85x = 40,263,579,386.72
  5. Step 5: Solve for x
    x = 40,263,579,386.72/225,086.85
  6. Step 6: Final answer
    x = 178,880.19

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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.