Home / 64,775.28-89,390.24-40,912.64

Finding the Fourth Proportional to 64,775.28, 89,390.24 and 40,912.64

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Solution

The fourth proportional to 64,775.28, 89,390.24 and 40,912.64 is: 56,459.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,775.28 : 89,390.24 = 40,912.64 : x
  2. Step 2: Convert to fraction form
    64,775.28/89,390.24 = 40,912.64/x
  3. Step 3: Cross multiply
    64,775.28x = 89,390.24 × 40,912.64
  4. Step 4: Simplify right side
    64,775.28x = 3,657,190,708.63
  5. Step 5: Solve for x
    x = 3,657,190,708.63/64,775.28
  6. Step 6: Final answer
    x = 56,459.67

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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.