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Finding the Fourth Proportional to 89,892.80, 134,839.20 and 48,420.80

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Solution

The fourth proportional to 89,892.80, 134,839.20 and 48,420.80 is: 72,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,892.80 : 134,839.20 = 48,420.80 : x
  2. Step 2: Convert to fraction form
    89,892.80/134,839.20 = 48,420.80/x
  3. Step 3: Cross multiply
    89,892.80x = 134,839.20 × 48,420.80
  4. Step 4: Simplify right side
    89,892.80x = 6,529,021,935.36
  5. Step 5: Solve for x
    x = 6,529,021,935.36/89,892.80
  6. Step 6: Final answer
    x = 72,631.20

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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.