Home / 221,690.40-332,666.72-81,547.36

Finding the Fourth Proportional to 221,690.40, 332,666.72 and 81,547.36

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Solution

The fourth proportional to 221,690.40, 332,666.72 and 81,547.36 is: 122,369.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,690.40 : 332,666.72 = 81,547.36 : x
  2. Step 2: Convert to fraction form
    221,690.40/332,666.72 = 81,547.36/x
  3. Step 3: Cross multiply
    221,690.40x = 332,666.72 × 81,547.36
  4. Step 4: Simplify right side
    221,690.40x = 27,128,092,775.86
  5. Step 5: Solve for x
    x = 27,128,092,775.86/221,690.40
  6. Step 6: Final answer
    x = 122,369.27

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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.