Home / 345,988.68-518,979.90-109,331.40

Finding the Fourth Proportional to 345,988.68, 518,979.90 and 109,331.40

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Solution

The fourth proportional to 345,988.68, 518,979.90 and 109,331.40 is: 163,996.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,988.68 : 518,979.90 = 109,331.40 : x
  2. Step 2: Convert to fraction form
    345,988.68/518,979.90 = 109,331.40/x
  3. Step 3: Cross multiply
    345,988.68x = 518,979.90 × 109,331.40
  4. Step 4: Simplify right side
    345,988.68x = 56,740,799,038.86
  5. Step 5: Solve for x
    x = 56,740,799,038.86/345,988.68
  6. Step 6: Final answer
    x = 163,996.11

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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.