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Finding the Fourth Proportional to 112,554.80, 168,832.20 and 86,310.80

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Solution

The fourth proportional to 112,554.80, 168,832.20 and 86,310.80 is: 129,466.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,554.80 : 168,832.20 = 86,310.80 : x
  2. Step 2: Convert to fraction form
    112,554.80/168,832.20 = 86,310.80/x
  3. Step 3: Cross multiply
    112,554.80x = 168,832.20 × 86,310.80
  4. Step 4: Simplify right side
    112,554.80x = 14,572,042,247.76
  5. Step 5: Solve for x
    x = 14,572,042,247.76/112,554.80
  6. Step 6: Final answer
    x = 129,466.20

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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.