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Finding the Fourth Proportional to 112,140.40, 168,145.80 and 42,026.80

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Solution

The fourth proportional to 112,140.40, 168,145.80 and 42,026.80 is: 63,015.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,140.40 : 168,145.80 = 42,026.80 : x
  2. Step 2: Convert to fraction form
    112,140.40/168,145.80 = 42,026.80/x
  3. Step 3: Cross multiply
    112,140.40x = 168,145.80 × 42,026.80
  4. Step 4: Simplify right side
    112,140.40x = 7,066,629,907.44
  5. Step 5: Solve for x
    x = 7,066,629,907.44/112,140.40
  6. Step 6: Final answer
    x = 63,015.91

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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.