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Finding the Fourth Proportional to 112,178.80, 168,041.40 and 69,929.20

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Solution

The fourth proportional to 112,178.80, 168,041.40 and 69,929.20 is: 104,752.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,178.80 : 168,041.40 = 69,929.20 : x
  2. Step 2: Convert to fraction form
    112,178.80/168,041.40 = 69,929.20/x
  3. Step 3: Cross multiply
    112,178.80x = 168,041.40 × 69,929.20
  4. Step 4: Simplify right side
    112,178.80x = 11,751,000,668.88
  5. Step 5: Solve for x
    x = 11,751,000,668.88/112,178.80
  6. Step 6: Final answer
    x = 104,752.42

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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.