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Finding the Fourth Proportional to 85,370.84, 128,336.72 and 79,205.36

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Solution

The fourth proportional to 85,370.84, 128,336.72 and 79,205.36 is: 119,068.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,370.84 : 128,336.72 = 79,205.36 : x
  2. Step 2: Convert to fraction form
    85,370.84/128,336.72 = 79,205.36/x
  3. Step 3: Cross multiply
    85,370.84x = 128,336.72 × 79,205.36
  4. Step 4: Simplify right side
    85,370.84x = 10,164,956,108.82
  5. Step 5: Solve for x
    x = 10,164,956,108.82/85,370.84
  6. Step 6: Final answer
    x = 119,068.25

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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.