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Finding the Fourth Proportional to 89,218.60, 133,698.30 and 75,999.40

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Solution

The fourth proportional to 89,218.60, 133,698.30 and 75,999.40 is: 113,888.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,218.60 : 133,698.30 = 75,999.40 : x
  2. Step 2: Convert to fraction form
    89,218.60/133,698.30 = 75,999.40/x
  3. Step 3: Cross multiply
    89,218.60x = 133,698.30 × 75,999.40
  4. Step 4: Simplify right side
    89,218.60x = 10,160,990,581.02
  5. Step 5: Solve for x
    x = 10,160,990,581.02/89,218.60
  6. Step 6: Final answer
    x = 113,888.70

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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.