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Finding the Fourth Proportional to 84,923.40, 127,530.90 and 55,471.80

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Solution

The fourth proportional to 84,923.40, 127,530.90 and 55,471.80 is: 83,302.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,923.40 : 127,530.90 = 55,471.80 : x
  2. Step 2: Convert to fraction form
    84,923.40/127,530.90 = 55,471.80/x
  3. Step 3: Cross multiply
    84,923.40x = 127,530.90 × 55,471.80
  4. Step 4: Simplify right side
    84,923.40x = 7,074,368,578.62
  5. Step 5: Solve for x
    x = 7,074,368,578.62/84,923.40
  6. Step 6: Final answer
    x = 83,302.94

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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.