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Finding the Fourth Proportional to 225,090.72, 310,636.32 and 129,612.48

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Solution

The fourth proportional to 225,090.72, 310,636.32 and 129,612.48 is: 178,871.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,090.72 : 310,636.32 = 129,612.48 : x
  2. Step 2: Convert to fraction form
    225,090.72/310,636.32 = 129,612.48/x
  3. Step 3: Cross multiply
    225,090.72x = 310,636.32 × 129,612.48
  4. Step 4: Simplify right side
    225,090.72x = 40,262,343,813.27
  5. Step 5: Solve for x
    x = 40,262,343,813.27/225,090.72
  6. Step 6: Final answer
    x = 178,871.63

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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.