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Finding the Fourth Proportional to 138,765.64, 191,500.08 and 85,080.27

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Solution

The fourth proportional to 138,765.64, 191,500.08 and 85,080.27 is: 117,412.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,765.64 : 191,500.08 = 85,080.27 : x
  2. Step 2: Convert to fraction form
    138,765.64/191,500.08 = 85,080.27/x
  3. Step 3: Cross multiply
    138,765.64x = 191,500.08 × 85,080.27
  4. Step 4: Simplify right side
    138,765.64x = 16,292,878,511.42
  5. Step 5: Solve for x
    x = 16,292,878,511.42/138,765.64
  6. Step 6: Final answer
    x = 117,412.92

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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.