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Finding the Fourth Proportional to 219,430.80, 329,117.02 and 86,275.30

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Solution

The fourth proportional to 219,430.80, 329,117.02 and 86,275.30 is: 129,401.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,430.80 : 329,117.02 = 86,275.30 : x
  2. Step 2: Convert to fraction form
    219,430.80/329,117.02 = 86,275.30/x
  3. Step 3: Cross multiply
    219,430.80x = 329,117.02 × 86,275.30
  4. Step 4: Simplify right side
    219,430.80x = 28,394,669,635.61
  5. Step 5: Solve for x
    x = 28,394,669,635.61/219,430.80
  6. Step 6: Final answer
    x = 129,401.48

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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.