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Finding the Fourth Proportional to 110,903.68, 153,003.68 and 68,388.40

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Solution

The fourth proportional to 110,903.68, 153,003.68 and 68,388.40 is: 94,349.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,903.68 : 153,003.68 = 68,388.40 : x
  2. Step 2: Convert to fraction form
    110,903.68/153,003.68 = 68,388.40/x
  3. Step 3: Cross multiply
    110,903.68x = 153,003.68 × 68,388.40
  4. Step 4: Simplify right side
    110,903.68x = 10,463,676,869.31
  5. Step 5: Solve for x
    x = 10,463,676,869.31/110,903.68
  6. Step 6: Final answer
    x = 94,349.23

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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.