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Finding the Fourth Proportional to 390,119.10, 585,176.82 and 123,900.14

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Solution

The fourth proportional to 390,119.10, 585,176.82 and 123,900.14 is: 185,849.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,119.10 : 585,176.82 = 123,900.14 : x
  2. Step 2: Convert to fraction form
    390,119.10/585,176.82 = 123,900.14/x
  3. Step 3: Cross multiply
    390,119.10x = 585,176.82 × 123,900.14
  4. Step 4: Simplify right side
    390,119.10x = 72,503,490,921.07
  5. Step 5: Solve for x
    x = 72,503,490,921.07/390,119.10
  6. Step 6: Final answer
    x = 185,849.63

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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.