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Finding the Fourth Proportional to 70,647.28, 97,487.64 and 40,425.68

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Solution

The fourth proportional to 70,647.28, 97,487.64 and 40,425.68 is: 55,784.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,647.28 : 97,487.64 = 40,425.68 : x
  2. Step 2: Convert to fraction form
    70,647.28/97,487.64 = 40,425.68/x
  3. Step 3: Cross multiply
    70,647.28x = 97,487.64 × 40,425.68
  4. Step 4: Simplify right side
    70,647.28x = 3,941,004,138.60
  5. Step 5: Solve for x
    x = 3,941,004,138.60/70,647.28
  6. Step 6: Final answer
    x = 55,784.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.