Home / 155,213.20-214,211.98-86,309.55

Finding the Fourth Proportional to 155,213.20, 214,211.98 and 86,309.55

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Solution

The fourth proportional to 155,213.20, 214,211.98 and 86,309.55 is: 119,117.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,213.20 : 214,211.98 = 86,309.55 : x
  2. Step 2: Convert to fraction form
    155,213.20/214,211.98 = 86,309.55/x
  3. Step 3: Cross multiply
    155,213.20x = 214,211.98 × 86,309.55
  4. Step 4: Simplify right side
    155,213.20x = 18,488,539,346.57
  5. Step 5: Solve for x
    x = 18,488,539,346.57/155,213.20
  6. Step 6: Final answer
    x = 119,117.05

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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.