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Finding the Fourth Proportional to 170,421.60, 255,632.40 and 120,655.20

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Solution

The fourth proportional to 170,421.60, 255,632.40 and 120,655.20 is: 180,982.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,421.60 : 255,632.40 = 120,655.20 : x
  2. Step 2: Convert to fraction form
    170,421.60/255,632.40 = 120,655.20/x
  3. Step 3: Cross multiply
    170,421.60x = 255,632.40 × 120,655.20
  4. Step 4: Simplify right side
    170,421.60x = 30,843,378,348.48
  5. Step 5: Solve for x
    x = 30,843,378,348.48/170,421.60
  6. Step 6: Final answer
    x = 180,982.80

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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.