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Finding the Fourth Proportional to 64,963.56, 89,647.12 and 40,777.40

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Solution

The fourth proportional to 64,963.56, 89,647.12 and 40,777.40 is: 56,271.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,963.56 : 89,647.12 = 40,777.40 : x
  2. Step 2: Convert to fraction form
    64,963.56/89,647.12 = 40,777.40/x
  3. Step 3: Cross multiply
    64,963.56x = 89,647.12 × 40,777.40
  4. Step 4: Simplify right side
    64,963.56x = 3,655,576,471.09
  5. Step 5: Solve for x
    x = 3,655,576,471.09/64,963.56
  6. Step 6: Final answer
    x = 56,271.18

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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.