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Finding the Fourth Proportional to 92,501.60, 138,752.40 and 85,940.60

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Solution

The fourth proportional to 92,501.60, 138,752.40 and 85,940.60 is: 128,910.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,501.60 : 138,752.40 = 85,940.60 : x
  2. Step 2: Convert to fraction form
    92,501.60/138,752.40 = 85,940.60/x
  3. Step 3: Cross multiply
    92,501.60x = 138,752.40 × 85,940.60
  4. Step 4: Simplify right side
    92,501.60x = 11,924,464,507.44
  5. Step 5: Solve for x
    x = 11,924,464,507.44/92,501.60
  6. Step 6: Final answer
    x = 128,910.90

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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.