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Finding the Fourth Proportional to 92,959.60, 128,533.08 and 81,149.80

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Solution

The fourth proportional to 92,959.60, 128,533.08 and 81,149.80 is: 112,203.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,959.60 : 128,533.08 = 81,149.80 : x
  2. Step 2: Convert to fraction form
    92,959.60/128,533.08 = 81,149.80/x
  3. Step 3: Cross multiply
    92,959.60x = 128,533.08 × 81,149.80
  4. Step 4: Simplify right side
    92,959.60x = 10,430,433,735.38
  5. Step 5: Solve for x
    x = 10,430,433,735.38/92,959.60
  6. Step 6: Final answer
    x = 112,203.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.