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Finding the Fourth Proportional to 180,420.60, 270,630.90 and 86,935.80

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Solution

The fourth proportional to 180,420.60, 270,630.90 and 86,935.80 is: 130,403.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,420.60 : 270,630.90 = 86,935.80 : x
  2. Step 2: Convert to fraction form
    180,420.60/270,630.90 = 86,935.80/x
  3. Step 3: Cross multiply
    180,420.60x = 270,630.90 × 86,935.80
  4. Step 4: Simplify right side
    180,420.60x = 23,527,513,796.22
  5. Step 5: Solve for x
    x = 23,527,513,796.22/180,420.60
  6. Step 6: Final answer
    x = 130,403.70

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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.