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Finding the Fourth Proportional to 215,875.81, 297,909.92 and 120,388.55

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Solution

The fourth proportional to 215,875.81, 297,909.92 and 120,388.55 is: 166,136.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,875.81 : 297,909.92 = 120,388.55 : x
  2. Step 2: Convert to fraction form
    215,875.81/297,909.92 = 120,388.55/x
  3. Step 3: Cross multiply
    215,875.81x = 297,909.92 × 120,388.55
  4. Step 4: Simplify right side
    215,875.81x = 35,864,943,299.42
  5. Step 5: Solve for x
    x = 35,864,943,299.42/215,875.81
  6. Step 6: Final answer
    x = 166,136.93

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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.