Home / 84,009.40-125,999.70-31,391.80

Finding the Fourth Proportional to 84,009.40, 125,999.70 and 31,391.80

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Solution

The fourth proportional to 84,009.40, 125,999.70 and 31,391.80 is: 47,082.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,009.40 : 125,999.70 = 31,391.80 : x
  2. Step 2: Convert to fraction form
    84,009.40/125,999.70 = 31,391.80/x
  3. Step 3: Cross multiply
    84,009.40x = 125,999.70 × 31,391.80
  4. Step 4: Simplify right side
    84,009.40x = 3,955,357,382.46
  5. Step 5: Solve for x
    x = 3,955,357,382.46/84,009.40
  6. Step 6: Final answer
    x = 47,082.32

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1.5x scale

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.