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Finding the Fourth Proportional to 215,875.90, 323,906.91 and 115,919.20

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Solution

The fourth proportional to 215,875.90, 323,906.91 and 115,919.20 is: 173,928.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,875.90 : 323,906.91 = 115,919.20 : x
  2. Step 2: Convert to fraction form
    215,875.90/323,906.91 = 115,919.20/x
  3. Step 3: Cross multiply
    215,875.90x = 323,906.91 × 115,919.20
  4. Step 4: Simplify right side
    215,875.90x = 37,547,029,881.67
  5. Step 5: Solve for x
    x = 37,547,029,881.67/215,875.90
  6. Step 6: Final answer
    x = 173,928.77

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1.5x scale

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.