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Finding the Fourth Proportional to 130,051.20, 194,858.10 and 85,655.10

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Solution

The fourth proportional to 130,051.20, 194,858.10 and 85,655.10 is: 128,338.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,051.20 : 194,858.10 = 85,655.10 : x
  2. Step 2: Convert to fraction form
    130,051.20/194,858.10 = 85,655.10/x
  3. Step 3: Cross multiply
    130,051.20x = 194,858.10 × 85,655.10
  4. Step 4: Simplify right side
    130,051.20x = 16,690,590,041.31
  5. Step 5: Solve for x
    x = 16,690,590,041.31/130,051.20
  6. Step 6: Final answer
    x = 128,338.61

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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.