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Finding the Fourth Proportional to 190,775.80, 286,034.10 and 72,429.40

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Solution

The fourth proportional to 190,775.80, 286,034.10 and 72,429.40 is: 108,594.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,775.80 : 286,034.10 = 72,429.40 : x
  2. Step 2: Convert to fraction form
    190,775.80/286,034.10 = 72,429.40/x
  3. Step 3: Cross multiply
    190,775.80x = 286,034.10 × 72,429.40
  4. Step 4: Simplify right side
    190,775.80x = 20,717,278,242.54
  5. Step 5: Solve for x
    x = 20,717,278,242.54/190,775.80
  6. Step 6: Final answer
    x = 108,594.90

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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.