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Finding the Fourth Proportional to 91,728.40, 137,592.60 and 70,966.80

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Solution

The fourth proportional to 91,728.40, 137,592.60 and 70,966.80 is: 106,450.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,728.40 : 137,592.60 = 70,966.80 : x
  2. Step 2: Convert to fraction form
    91,728.40/137,592.60 = 70,966.80/x
  3. Step 3: Cross multiply
    91,728.40x = 137,592.60 × 70,966.80
  4. Step 4: Simplify right side
    91,728.40x = 9,764,506,525.68
  5. Step 5: Solve for x
    x = 9,764,506,525.68/91,728.40
  6. Step 6: Final answer
    x = 106,450.20

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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.