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Finding the Fourth Proportional to 89,154.40, 133,731.60 and 84,780.40

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Solution

The fourth proportional to 89,154.40, 133,731.60 and 84,780.40 is: 127,170.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,154.40 : 133,731.60 = 84,780.40 : x
  2. Step 2: Convert to fraction form
    89,154.40/133,731.60 = 84,780.40/x
  3. Step 3: Cross multiply
    89,154.40x = 133,731.60 × 84,780.40
  4. Step 4: Simplify right side
    89,154.40x = 11,337,818,540.64
  5. Step 5: Solve for x
    x = 11,337,818,540.64/89,154.40
  6. Step 6: Final answer
    x = 127,170.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.