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Finding the Fourth Proportional to 89,075.80, 133,613.70 and 81,040.60

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Solution

The fourth proportional to 89,075.80, 133,613.70 and 81,040.60 is: 121,560.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,075.80 : 133,613.70 = 81,040.60 : x
  2. Step 2: Convert to fraction form
    89,075.80/133,613.70 = 81,040.60/x
  3. Step 3: Cross multiply
    89,075.80x = 133,613.70 × 81,040.60
  4. Step 4: Simplify right side
    89,075.80x = 10,828,134,416.22
  5. Step 5: Solve for x
    x = 10,828,134,416.22/89,075.80
  6. Step 6: Final answer
    x = 121,560.90

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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.