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Finding the Fourth Proportional to 228,999.84, 316,026 and 128,395.68

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Solution

The fourth proportional to 228,999.84, 316,026 and 128,395.68 is: 177,189.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,999.84 : 316,026 = 128,395.68 : x
  2. Step 2: Convert to fraction form
    228,999.84/316,026 = 128,395.68/x
  3. Step 3: Cross multiply
    228,999.84x = 316,026 × 128,395.68
  4. Step 4: Simplify right side
    228,999.84x = 40,576,373,167.68
  5. Step 5: Solve for x
    x = 40,576,373,167.68/228,999.84
  6. Step 6: Final answer
    x = 177,189.53

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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.