Home / 390,018.12-585,049.05-109,513.50

Finding the Fourth Proportional to 390,018.12, 585,049.05 and 109,513.50

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Solution

The fourth proportional to 390,018.12, 585,049.05 and 109,513.50 is: 164,276.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,018.12 : 585,049.05 = 109,513.50 : x
  2. Step 2: Convert to fraction form
    390,018.12/585,049.05 = 109,513.50/x
  3. Step 3: Cross multiply
    390,018.12x = 585,049.05 × 109,513.50
  4. Step 4: Simplify right side
    390,018.12x = 64,070,769,137.18
  5. Step 5: Solve for x
    x = 64,070,769,137.18/390,018.12
  6. Step 6: Final answer
    x = 164,276.39

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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.