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Finding the Fourth Proportional to 91,313.60, 137,072.80 and 70,628.80

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Solution

The fourth proportional to 91,313.60, 137,072.80 and 70,628.80 is: 106,022.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,313.60 : 137,072.80 = 70,628.80 : x
  2. Step 2: Convert to fraction form
    91,313.60/137,072.80 = 70,628.80/x
  3. Step 3: Cross multiply
    91,313.60x = 137,072.80 × 70,628.80
  4. Step 4: Simplify right side
    91,313.60x = 9,681,287,376.64
  5. Step 5: Solve for x
    x = 9,681,287,376.64/91,313.60
  6. Step 6: Final answer
    x = 106,022.40

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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.