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Finding the Fourth Proportional to 89,864.40, 134,796.60 and 61,870.80

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Solution

The fourth proportional to 89,864.40, 134,796.60 and 61,870.80 is: 92,806.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,864.40 : 134,796.60 = 61,870.80 : x
  2. Step 2: Convert to fraction form
    89,864.40/134,796.60 = 61,870.80/x
  3. Step 3: Cross multiply
    89,864.40x = 134,796.60 × 61,870.80
  4. Step 4: Simplify right side
    89,864.40x = 8,339,973,479.28
  5. Step 5: Solve for x
    x = 8,339,973,479.28/89,864.40
  6. Step 6: Final answer
    x = 92,806.20

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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.