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Finding the Fourth Proportional to 154,491.13, 213,201 and 87,423.13

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Solution

The fourth proportional to 154,491.13, 213,201 and 87,423.13 is: 120,645.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,491.13 : 213,201 = 87,423.13 : x
  2. Step 2: Convert to fraction form
    154,491.13/213,201 = 87,423.13/x
  3. Step 3: Cross multiply
    154,491.13x = 213,201 × 87,423.13
  4. Step 4: Simplify right side
    154,491.13x = 18,638,698,739.13
  5. Step 5: Solve for x
    x = 18,638,698,739.13/154,491.13
  6. Step 6: Final answer
    x = 120,645.75

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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.