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Finding the Fourth Proportional to 85,007.40, 127,316.70 and 43,405.80

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Solution

The fourth proportional to 85,007.40, 127,316.70 and 43,405.80 is: 65,009.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,007.40 : 127,316.70 = 43,405.80 : x
  2. Step 2: Convert to fraction form
    85,007.40/127,316.70 = 43,405.80/x
  3. Step 3: Cross multiply
    85,007.40x = 127,316.70 × 43,405.80
  4. Step 4: Simplify right side
    85,007.40x = 5,526,283,216.86
  5. Step 5: Solve for x
    x = 5,526,283,216.86/85,007.40
  6. Step 6: Final answer
    x = 65,009.44

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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.