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Finding the Fourth Proportional to 103,607.36, 155,186.40 and 64,174.40

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Solution

The fourth proportional to 103,607.36, 155,186.40 and 64,174.40 is: 96,122.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,607.36 : 155,186.40 = 64,174.40 : x
  2. Step 2: Convert to fraction form
    103,607.36/155,186.40 = 64,174.40/x
  3. Step 3: Cross multiply
    103,607.36x = 155,186.40 × 64,174.40
  4. Step 4: Simplify right side
    103,607.36x = 9,958,994,108.16
  5. Step 5: Solve for x
    x = 9,958,994,108.16/103,607.36
  6. Step 6: Final answer
    x = 96,122.46

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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.