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Finding the Fourth Proportional to 85,406.60, 127,764.30 and 75,038.60

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Solution

The fourth proportional to 85,406.60, 127,764.30 and 75,038.60 is: 112,254.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406.60 : 127,764.30 = 75,038.60 : x
  2. Step 2: Convert to fraction form
    85,406.60/127,764.30 = 75,038.60/x
  3. Step 3: Cross multiply
    85,406.60x = 127,764.30 × 75,038.60
  4. Step 4: Simplify right side
    85,406.60x = 9,587,254,201.98
  5. Step 5: Solve for x
    x = 9,587,254,201.98/85,406.60
  6. Step 6: Final answer
    x = 112,254.25

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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.