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Finding the Fourth Proportional to 112,893.20, 169,312.80 and 65,405.60

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Solution

The fourth proportional to 112,893.20, 169,312.80 and 65,405.60 is: 98,092.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,893.20 : 169,312.80 = 65,405.60 : x
  2. Step 2: Convert to fraction form
    112,893.20/169,312.80 = 65,405.60/x
  3. Step 3: Cross multiply
    112,893.20x = 169,312.80 × 65,405.60
  4. Step 4: Simplify right side
    112,893.20x = 11,074,005,271.68
  5. Step 5: Solve for x
    x = 11,074,005,271.68/112,893.20
  6. Step 6: Final answer
    x = 98,092.76

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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.