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Finding the Fourth Proportional to 103,642.40, 155,348.40 and 56,928.80

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Solution

The fourth proportional to 103,642.40, 155,348.40 and 56,928.80 is: 85,329.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,642.40 : 155,348.40 = 56,928.80 : x
  2. Step 2: Convert to fraction form
    103,642.40/155,348.40 = 56,928.80/x
  3. Step 3: Cross multiply
    103,642.40x = 155,348.40 × 56,928.80
  4. Step 4: Simplify right side
    103,642.40x = 8,843,797,993.92
  5. Step 5: Solve for x
    x = 8,843,797,993.92/103,642.40
  6. Step 6: Final answer
    x = 85,329.92

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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.