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Finding the Fourth Proportional to 88,991.40, 133,487.10 and 55,813.80

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Solution

The fourth proportional to 88,991.40, 133,487.10 and 55,813.80 is: 83,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,991.40 : 133,487.10 = 55,813.80 : x
  2. Step 2: Convert to fraction form
    88,991.40/133,487.10 = 55,813.80/x
  3. Step 3: Cross multiply
    88,991.40x = 133,487.10 × 55,813.80
  4. Step 4: Simplify right side
    88,991.40x = 7,450,422,301.98
  5. Step 5: Solve for x
    x = 7,450,422,301.98/88,991.40
  6. Step 6: Final answer
    x = 83,720.70

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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.