Home / 107,917.10-161,875.65-90,421.10

Finding the Fourth Proportional to 107,917.10, 161,875.65 and 90,421.10

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Solution

The fourth proportional to 107,917.10, 161,875.65 and 90,421.10 is: 135,631.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,917.10 : 161,875.65 = 90,421.10 : x
  2. Step 2: Convert to fraction form
    107,917.10/161,875.65 = 90,421.10/x
  3. Step 3: Cross multiply
    107,917.10x = 161,875.65 × 90,421.10
  4. Step 4: Simplify right side
    107,917.10x = 14,636,974,336.22
  5. Step 5: Solve for x
    x = 14,636,974,336.22/107,917.10
  6. Step 6: Final answer
    x = 135,631.65

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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.