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Finding the Fourth Proportional to 99,633.62, 137,492.79 and 54,313.40

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Solution

The fourth proportional to 99,633.62, 137,492.79 and 54,313.40 is: 74,951.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,633.62 : 137,492.79 = 54,313.40 : x
  2. Step 2: Convert to fraction form
    99,633.62/137,492.79 = 54,313.40/x
  3. Step 3: Cross multiply
    99,633.62x = 137,492.79 × 54,313.40
  4. Step 4: Simplify right side
    99,633.62x = 7,467,700,900.39
  5. Step 5: Solve for x
    x = 7,467,700,900.39/99,633.62
  6. Step 6: Final answer
    x = 74,951.62

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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.