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Finding the Fourth Proportional to 221,390.80, 305,598.12 and 130,747.12

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Solution

The fourth proportional to 221,390.80, 305,598.12 and 130,747.12 is: 180,477.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,390.80 : 305,598.12 = 130,747.12 : x
  2. Step 2: Convert to fraction form
    221,390.80/305,598.12 = 130,747.12/x
  3. Step 3: Cross multiply
    221,390.80x = 305,598.12 × 130,747.12
  4. Step 4: Simplify right side
    221,390.80x = 39,956,074,067.41
  5. Step 5: Solve for x
    x = 39,956,074,067.41/221,390.80
  6. Step 6: Final answer
    x = 180,477.57

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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.