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Finding the Fourth Proportional to 219,482.80, 302,870.55 and 128,842.45

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Solution

The fourth proportional to 219,482.80, 302,870.55 and 128,842.45 is: 177,793.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,482.80 : 302,870.55 = 128,842.45 : x
  2. Step 2: Convert to fraction form
    219,482.80/302,870.55 = 128,842.45/x
  3. Step 3: Cross multiply
    219,482.80x = 302,870.55 × 128,842.45
  4. Step 4: Simplify right side
    219,482.80x = 39,022,583,694.85
  5. Step 5: Solve for x
    x = 39,022,583,694.85/219,482.80
  6. Step 6: Final answer
    x = 177,793.36

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1.5x scale

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.