Home / 154,934.40-213,768-87,864.96

Finding the Fourth Proportional to 154,934.40, 213,768 and 87,864.96

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Solution

The fourth proportional to 154,934.40, 213,768 and 87,864.96 is: 121,230.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,934.40 : 213,768 = 87,864.96 : x
  2. Step 2: Convert to fraction form
    154,934.40/213,768 = 87,864.96/x
  3. Step 3: Cross multiply
    154,934.40x = 213,768 × 87,864.96
  4. Step 4: Simplify right side
    154,934.40x = 18,782,716,769.28
  5. Step 5: Solve for x
    x = 18,782,716,769.28/154,934.40
  6. Step 6: Final answer
    x = 121,230.13

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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.