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Finding the Fourth Proportional to 272,606.60, 408,909.90 and 85,617.80

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Solution

The fourth proportional to 272,606.60, 408,909.90 and 85,617.80 is: 128,426.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,606.60 : 408,909.90 = 85,617.80 : x
  2. Step 2: Convert to fraction form
    272,606.60/408,909.90 = 85,617.80/x
  3. Step 3: Cross multiply
    272,606.60x = 408,909.90 × 85,617.80
  4. Step 4: Simplify right side
    272,606.60x = 35,009,966,036.22
  5. Step 5: Solve for x
    x = 35,009,966,036.22/272,606.60
  6. Step 6: Final answer
    x = 128,426.70

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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.