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Finding the Fourth Proportional to 91,378.40, 137,067.60 and 70,616.80

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Solution

The fourth proportional to 91,378.40, 137,067.60 and 70,616.80 is: 105,925.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,378.40 : 137,067.60 = 70,616.80 : x
  2. Step 2: Convert to fraction form
    91,378.40/137,067.60 = 70,616.80/x
  3. Step 3: Cross multiply
    91,378.40x = 137,067.60 × 70,616.80
  4. Step 4: Simplify right side
    91,378.40x = 9,679,275,295.68
  5. Step 5: Solve for x
    x = 9,679,275,295.68/91,378.40
  6. Step 6: Final answer
    x = 105,925.20

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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.