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Finding the Fourth Proportional to 84,009.80, 125,868.90 and 54,412.40

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Solution

The fourth proportional to 84,009.80, 125,868.90 and 54,412.40 is: 81,524.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,009.80 : 125,868.90 = 54,412.40 : x
  2. Step 2: Convert to fraction form
    84,009.80/125,868.90 = 54,412.40/x
  3. Step 3: Cross multiply
    84,009.80x = 125,868.90 × 54,412.40
  4. Step 4: Simplify right side
    84,009.80x = 6,848,828,934.36
  5. Step 5: Solve for x
    x = 6,848,828,934.36/84,009.80
  6. Step 6: Final answer
    x = 81,524.17

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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.