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Finding the Fourth Proportional to 228,720.96, 315,649.44 and 128,134.08

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Solution

The fourth proportional to 228,720.96, 315,649.44 and 128,134.08 is: 176,833.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,720.96 : 315,649.44 = 128,134.08 : x
  2. Step 2: Convert to fraction form
    228,720.96/315,649.44 = 128,134.08/x
  3. Step 3: Cross multiply
    228,720.96x = 315,649.44 × 128,134.08
  4. Step 4: Simplify right side
    228,720.96x = 40,445,450,596.92
  5. Step 5: Solve for x
    x = 40,445,450,596.92/228,720.96
  6. Step 6: Final answer
    x = 176,833.16

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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.