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Finding the Fourth Proportional to 100,783.44, 139,052.30 and 64,994.00

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Solution

The fourth proportional to 100,783.44, 139,052.30 and 64,994.00 is: 89,673.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,783.44 : 139,052.30 = 64,994.00 : x
  2. Step 2: Convert to fraction form
    100,783.44/139,052.30 = 64,994.00/x
  3. Step 3: Cross multiply
    100,783.44x = 139,052.30 × 64,994.00
  4. Step 4: Simplify right side
    100,783.44x = 9,037,564,165.97
  5. Step 5: Solve for x
    x = 9,037,564,165.97/100,783.44
  6. Step 6: Final answer
    x = 89,673.11

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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.