Home / 390,109.41-585,333.15-137,570.35

Finding the Fourth Proportional to 390,109.41, 585,333.15 and 137,570.35

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Solution

The fourth proportional to 390,109.41, 585,333.15 and 137,570.35 is: 206,415.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,109.41 : 585,333.15 = 137,570.35 : x
  2. Step 2: Convert to fraction form
    390,109.41/585,333.15 = 137,570.35/x
  3. Step 3: Cross multiply
    390,109.41x = 585,333.15 × 137,570.35
  4. Step 4: Simplify right side
    390,109.41x = 80,524,486,312.10
  5. Step 5: Solve for x
    x = 80,524,486,312.10/390,109.41
  6. Step 6: Final answer
    x = 206,415.13

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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.