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Finding the Fourth Proportional to 89,808.80, 134,482.80 and 85,661.60

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Solution

The fourth proportional to 89,808.80, 134,482.80 and 85,661.60 is: 128,272.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,808.80 : 134,482.80 = 85,661.60 : x
  2. Step 2: Convert to fraction form
    89,808.80/134,482.80 = 85,661.60/x
  3. Step 3: Cross multiply
    89,808.80x = 134,482.80 × 85,661.60
  4. Step 4: Simplify right side
    89,808.80x = 11,520,011,820.48
  5. Step 5: Solve for x
    x = 11,520,011,820.48/89,808.80
  6. Step 6: Final answer
    x = 128,272.64

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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.