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Finding the Fourth Proportional to 167,381.28, 230,985.12 and 100,313.28

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Solution

The fourth proportional to 167,381.28, 230,985.12 and 100,313.28 is: 138,431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,381.28 : 230,985.12 = 100,313.28 : x
  2. Step 2: Convert to fraction form
    167,381.28/230,985.12 = 100,313.28/x
  3. Step 3: Cross multiply
    167,381.28x = 230,985.12 × 100,313.28
  4. Step 4: Simplify right side
    167,381.28x = 23,170,875,018.39
  5. Step 5: Solve for x
    x = 23,170,875,018.39/167,381.28
  6. Step 6: Final answer
    x = 138,431.70

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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.