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Finding the Fourth Proportional to 85,125.40, 127,385.70 and 74,152.60

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Solution

The fourth proportional to 85,125.40, 127,385.70 and 74,152.60 is: 110,965.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,125.40 : 127,385.70 = 74,152.60 : x
  2. Step 2: Convert to fraction form
    85,125.40/127,385.70 = 74,152.60/x
  3. Step 3: Cross multiply
    85,125.40x = 127,385.70 × 74,152.60
  4. Step 4: Simplify right side
    85,125.40x = 9,445,980,857.82
  5. Step 5: Solve for x
    x = 9,445,980,857.82/85,125.40
  6. Step 6: Final answer
    x = 110,965.48

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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.