Home / 107,916.10-161,874.15-90,420.10

Finding the Fourth Proportional to 107,916.10, 161,874.15 and 90,420.10

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Solution

The fourth proportional to 107,916.10, 161,874.15 and 90,420.10 is: 135,630.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,916.10 : 161,874.15 = 90,420.10 : x
  2. Step 2: Convert to fraction form
    107,916.10/161,874.15 = 90,420.10/x
  3. Step 3: Cross multiply
    107,916.10x = 161,874.15 × 90,420.10
  4. Step 4: Simplify right side
    107,916.10x = 14,636,676,830.42
  5. Step 5: Solve for x
    x = 14,636,676,830.42/107,916.10
  6. Step 6: Final answer
    x = 135,630.15

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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.