Home / 210,876.21-316,278.78-90,900.12

Finding the Fourth Proportional to 210,876.21, 316,278.78 and 90,900.12

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Solution

The fourth proportional to 210,876.21, 316,278.78 and 90,900.12 is: 136,334.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,876.21 : 316,278.78 = 90,900.12 : x
  2. Step 2: Convert to fraction form
    210,876.21/316,278.78 = 90,900.12/x
  3. Step 3: Cross multiply
    210,876.21x = 316,278.78 × 90,900.12
  4. Step 4: Simplify right side
    210,876.21x = 28,749,779,900.62
  5. Step 5: Solve for x
    x = 28,749,779,900.62/210,876.21
  6. Step 6: Final answer
    x = 136,334.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.