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Finding the Fourth Proportional to 219,682.80, 329,560.65 and 86,567.40

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Solution

The fourth proportional to 219,682.80, 329,560.65 and 86,567.40 is: 129,865.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,682.80 : 329,560.65 = 86,567.40 : x
  2. Step 2: Convert to fraction form
    219,682.80/329,560.65 = 86,567.40/x
  3. Step 3: Cross multiply
    219,682.80x = 329,560.65 × 86,567.40
  4. Step 4: Simplify right side
    219,682.80x = 28,529,208,612.81
  5. Step 5: Solve for x
    x = 28,529,208,612.81/219,682.80
  6. Step 6: Final answer
    x = 129,865.46

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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.