Home / 84,210.72-126,279.12-31,583.30

Finding the Fourth Proportional to 84,210.72, 126,279.12 and 31,583.30

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Solution

The fourth proportional to 84,210.72, 126,279.12 and 31,583.30 is: 47,361.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,210.72 : 126,279.12 = 31,583.30 : x
  2. Step 2: Convert to fraction form
    84,210.72/126,279.12 = 31,583.30/x
  3. Step 3: Cross multiply
    84,210.72x = 126,279.12 × 31,583.30
  4. Step 4: Simplify right side
    84,210.72x = 3,988,310,699.30
  5. Step 5: Solve for x
    x = 3,988,310,699.30/84,210.72
  6. Step 6: Final answer
    x = 47,361.08

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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.