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Finding the Fourth Proportional to 89,478.86, 133,926.17 and 65,780.12

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Solution

The fourth proportional to 89,478.86, 133,926.17 and 65,780.12 is: 98,455.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,478.86 : 133,926.17 = 65,780.12 : x
  2. Step 2: Convert to fraction form
    89,478.86/133,926.17 = 65,780.12/x
  3. Step 3: Cross multiply
    89,478.86x = 133,926.17 × 65,780.12
  4. Step 4: Simplify right side
    89,478.86x = 8,809,679,204.84
  5. Step 5: Solve for x
    x = 8,809,679,204.84/89,478.86
  6. Step 6: Final answer
    x = 98,455.43

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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.