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Finding the Fourth Proportional to 390,170.08, 585,276.72 and 123,911.20

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Solution

The fourth proportional to 390,170.08, 585,276.72 and 123,911.20 is: 185,873.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,170.08 : 585,276.72 = 123,911.20 : x
  2. Step 2: Convert to fraction form
    390,170.08/585,276.72 = 123,911.20/x
  3. Step 3: Cross multiply
    390,170.08x = 585,276.72 × 123,911.20
  4. Step 4: Simplify right side
    390,170.08x = 72,522,340,707.26
  5. Step 5: Solve for x
    x = 72,522,340,707.26/390,170.08
  6. Step 6: Final answer
    x = 185,873.66

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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.