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Finding the Fourth Proportional to 112,909.48, 155,817.22 and 61,918.98

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Solution

The fourth proportional to 112,909.48, 155,817.22 and 61,918.98 is: 85,449.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,909.48 : 155,817.22 = 61,918.98 : x
  2. Step 2: Convert to fraction form
    112,909.48/155,817.22 = 61,918.98/x
  3. Step 3: Cross multiply
    112,909.48x = 155,817.22 × 61,918.98
  4. Step 4: Simplify right side
    112,909.48x = 9,648,043,328.84
  5. Step 5: Solve for x
    x = 9,648,043,328.84/112,909.48
  6. Step 6: Final answer
    x = 85,449.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.