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Finding the Fourth Proportional to 66,009.54, 99,018.63 and 19,258.50

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Solution

The fourth proportional to 66,009.54, 99,018.63 and 19,258.50 is: 28,889.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,009.54 : 99,018.63 = 19,258.50 : x
  2. Step 2: Convert to fraction form
    66,009.54/99,018.63 = 19,258.50/x
  3. Step 3: Cross multiply
    66,009.54x = 99,018.63 × 19,258.50
  4. Step 4: Simplify right side
    66,009.54x = 1,906,950,285.86
  5. Step 5: Solve for x
    x = 1,906,950,285.86/66,009.54
  6. Step 6: Final answer
    x = 28,889.01

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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.