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Finding the Fourth Proportional to 158,900.40, 219,301.92 and 91,832.40

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Solution

The fourth proportional to 158,900.40, 219,301.92 and 91,832.40 is: 126,739.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,900.40 : 219,301.92 = 91,832.40 : x
  2. Step 2: Convert to fraction form
    158,900.40/219,301.92 = 91,832.40/x
  3. Step 3: Cross multiply
    158,900.40x = 219,301.92 × 91,832.40
  4. Step 4: Simplify right side
    158,900.40x = 20,139,021,638.21
  5. Step 5: Solve for x
    x = 20,139,021,638.21/158,900.40
  6. Step 6: Final answer
    x = 126,739.91

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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.