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Finding the Fourth Proportional to 89,129.40, 133,847.70 and 86,364.60

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Solution

The fourth proportional to 89,129.40, 133,847.70 and 86,364.60 is: 129,695.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,129.40 : 133,847.70 = 86,364.60 : x
  2. Step 2: Convert to fraction form
    89,129.40/133,847.70 = 86,364.60/x
  3. Step 3: Cross multiply
    89,129.40x = 133,847.70 × 86,364.60
  4. Step 4: Simplify right side
    89,129.40x = 11,559,703,071.42
  5. Step 5: Solve for x
    x = 11,559,703,071.42/89,129.40
  6. Step 6: Final answer
    x = 129,695.74

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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.