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Finding the Fourth Proportional to 75,215.80, 112,866.90 and 28,502.20

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Solution

The fourth proportional to 75,215.80, 112,866.90 and 28,502.20 is: 42,769.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,215.80 : 112,866.90 = 28,502.20 : x
  2. Step 2: Convert to fraction form
    75,215.80/112,866.90 = 28,502.20/x
  3. Step 3: Cross multiply
    75,215.80x = 112,866.90 × 28,502.20
  4. Step 4: Simplify right side
    75,215.80x = 3,216,954,957.18
  5. Step 5: Solve for x
    x = 3,216,954,957.18/75,215.80
  6. Step 6: Final answer
    x = 42,769.67

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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.