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Finding the Fourth Proportional to 216,856.40, 325,430.40 and 122,086.40

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Solution

The fourth proportional to 216,856.40, 325,430.40 and 122,086.40 is: 183,211.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,856.40 : 325,430.40 = 122,086.40 : x
  2. Step 2: Convert to fraction form
    216,856.40/325,430.40 = 122,086.40/x
  3. Step 3: Cross multiply
    216,856.40x = 325,430.40 × 122,086.40
  4. Step 4: Simplify right side
    216,856.40x = 39,730,625,986.56
  5. Step 5: Solve for x
    x = 39,730,625,986.56/216,856.40
  6. Step 6: Final answer
    x = 183,211.68

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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.