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Finding the Fourth Proportional to 85,004.80, 127,507.20 and 84,486.40

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Solution

The fourth proportional to 85,004.80, 127,507.20 and 84,486.40 is: 126,729.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,004.80 : 127,507.20 = 84,486.40 : x
  2. Step 2: Convert to fraction form
    85,004.80/127,507.20 = 84,486.40/x
  3. Step 3: Cross multiply
    85,004.80x = 127,507.20 × 84,486.40
  4. Step 4: Simplify right side
    85,004.80x = 10,772,624,302.08
  5. Step 5: Solve for x
    x = 10,772,624,302.08/85,004.80
  6. Step 6: Final answer
    x = 126,729.60

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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.