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Finding the Fourth Proportional to 78,107.00, 107,787.65 and 42,297.03

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Solution

The fourth proportional to 78,107.00, 107,787.65 and 42,297.03 is: 58,369.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,107.00 : 107,787.65 = 42,297.03 : x
  2. Step 2: Convert to fraction form
    78,107.00/107,787.65 = 42,297.03/x
  3. Step 3: Cross multiply
    78,107.00x = 107,787.65 × 42,297.03
  4. Step 4: Simplify right side
    78,107.00x = 4,559,097,254.19
  5. Step 5: Solve for x
    x = 4,559,097,254.19/78,107.00
  6. Step 6: Final answer
    x = 58,369.90

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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.