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Finding the Fourth Proportional to 104,978.60, 157,467.90 and 38,420.90

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Solution

The fourth proportional to 104,978.60, 157,467.90 and 38,420.90 is: 57,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,978.60 : 157,467.90 = 38,420.90 : x
  2. Step 2: Convert to fraction form
    104,978.60/157,467.90 = 38,420.90/x
  3. Step 3: Cross multiply
    104,978.60x = 157,467.90 × 38,420.90
  4. Step 4: Simplify right side
    104,978.60x = 6,050,058,439.11
  5. Step 5: Solve for x
    x = 6,050,058,439.11/104,978.60
  6. Step 6: Final answer
    x = 57,631.35

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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.