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Finding the Fourth Proportional to 89,797.32, 133,635.74 and 86,807.34

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Solution

The fourth proportional to 89,797.32, 133,635.74 and 86,807.34 is: 129,186.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,797.32 : 133,635.74 = 86,807.34 : x
  2. Step 2: Convert to fraction form
    89,797.32/133,635.74 = 86,807.34/x
  3. Step 3: Cross multiply
    89,797.32x = 133,635.74 × 86,807.34
  4. Step 4: Simplify right side
    89,797.32x = 11,600,562,684.29
  5. Step 5: Solve for x
    x = 11,600,562,684.29/89,797.32
  6. Step 6: Final answer
    x = 129,186.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.