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Finding the Fourth Proportional to 42,589.40, 64,203.02 and 39,734.96

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Solution

The fourth proportional to 42,589.40, 64,203.02 and 39,734.96 is: 59,899.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,589.40 : 64,203.02 = 39,734.96 : x
  2. Step 2: Convert to fraction form
    42,589.40/64,203.02 = 39,734.96/x
  3. Step 3: Cross multiply
    42,589.40x = 64,203.02 × 39,734.96
  4. Step 4: Simplify right side
    42,589.40x = 2,551,104,431.58
  5. Step 5: Solve for x
    x = 2,551,104,431.58/42,589.40
  6. Step 6: Final answer
    x = 59,899.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.