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Finding the Fourth Proportional to 89,447.88, 123,428.16 and 53,639.40

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Solution

The fourth proportional to 89,447.88, 123,428.16 and 53,639.40 is: 74,016.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,447.88 : 123,428.16 = 53,639.40 : x
  2. Step 2: Convert to fraction form
    89,447.88/123,428.16 = 53,639.40/x
  3. Step 3: Cross multiply
    89,447.88x = 123,428.16 × 53,639.40
  4. Step 4: Simplify right side
    89,447.88x = 6,620,612,445.50
  5. Step 5: Solve for x
    x = 6,620,612,445.50/89,447.88
  6. Step 6: Final answer
    x = 74,016.43

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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.