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Finding the Fourth Proportional to 112,142.40, 168,148.80 and 42,028.80

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Solution

The fourth proportional to 112,142.40, 168,148.80 and 42,028.80 is: 63,018.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,142.40 : 168,148.80 = 42,028.80 : x
  2. Step 2: Convert to fraction form
    112,142.40/168,148.80 = 42,028.80/x
  3. Step 3: Cross multiply
    112,142.40x = 168,148.80 × 42,028.80
  4. Step 4: Simplify right side
    112,142.40x = 7,067,092,285.44
  5. Step 5: Solve for x
    x = 7,067,092,285.44/112,142.40
  6. Step 6: Final answer
    x = 63,018.91

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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.