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Finding the Fourth Proportional to 140,012.40, 209,885.79 and 55,824.30

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Solution

The fourth proportional to 140,012.40, 209,885.79 and 55,824.30 is: 83,683.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,012.40 : 209,885.79 = 55,824.30 : x
  2. Step 2: Convert to fraction form
    140,012.40/209,885.79 = 55,824.30/x
  3. Step 3: Cross multiply
    140,012.40x = 209,885.79 × 55,824.30
  4. Step 4: Simplify right side
    140,012.40x = 11,716,727,306.70
  5. Step 5: Solve for x
    x = 11,716,727,306.70/140,012.40
  6. Step 6: Final answer
    x = 83,683.50

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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.