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Finding the Fourth Proportional to 91,942.40, 138,043.20 and 56,950.40

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Solution

The fourth proportional to 91,942.40, 138,043.20 and 56,950.40 is: 85,505.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,942.40 : 138,043.20 = 56,950.40 : x
  2. Step 2: Convert to fraction form
    91,942.40/138,043.20 = 56,950.40/x
  3. Step 3: Cross multiply
    91,942.40x = 138,043.20 × 56,950.40
  4. Step 4: Simplify right side
    91,942.40x = 7,861,615,457.28
  5. Step 5: Solve for x
    x = 7,861,615,457.28/91,942.40
  6. Step 6: Final answer
    x = 85,505.88

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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.