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Finding the Fourth Proportional to 64,720.64, 89,302.56 and 36,420.32

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Solution

The fourth proportional to 64,720.64, 89,302.56 and 36,420.32 is: 50,253.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,720.64 : 89,302.56 = 36,420.32 : x
  2. Step 2: Convert to fraction form
    64,720.64/89,302.56 = 36,420.32/x
  3. Step 3: Cross multiply
    64,720.64x = 89,302.56 × 36,420.32
  4. Step 4: Simplify right side
    64,720.64x = 3,252,427,812.02
  5. Step 5: Solve for x
    x = 3,252,427,812.02/64,720.64
  6. Step 6: Final answer
    x = 50,253.33

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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.