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Finding the Fourth Proportional to 110,921.65, 153,068.45 and 63,181.81

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Solution

The fourth proportional to 110,921.65, 153,068.45 and 63,181.81 is: 87,188.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,921.65 : 153,068.45 = 63,181.81 : x
  2. Step 2: Convert to fraction form
    110,921.65/153,068.45 = 63,181.81/x
  3. Step 3: Cross multiply
    110,921.65x = 153,068.45 × 63,181.81
  4. Step 4: Simplify right side
    110,921.65x = 9,671,141,117.51
  5. Step 5: Solve for x
    x = 9,671,141,117.51/110,921.65
  6. Step 6: Final answer
    x = 87,188.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.