Home / 210,412.10-315,341.67-99,635.78

Finding the Fourth Proportional to 210,412.10, 315,341.67 and 99,635.78

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Solution

The fourth proportional to 210,412.10, 315,341.67 and 99,635.78 is: 149,322.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,412.10 : 315,341.67 = 99,635.78 : x
  2. Step 2: Convert to fraction form
    210,412.10/315,341.67 = 99,635.78/x
  3. Step 3: Cross multiply
    210,412.10x = 315,341.67 × 99,635.78
  4. Step 4: Simplify right side
    210,412.10x = 31,419,313,256.95
  5. Step 5: Solve for x
    x = 31,419,313,256.95/210,412.10
  6. Step 6: Final answer
    x = 149,322.75

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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.