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Finding the Fourth Proportional to 101,979.60, 152,910 and 39,577.20

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Solution

The fourth proportional to 101,979.60, 152,910 and 39,577.20 is: 59,342.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,979.60 : 152,910 = 39,577.20 : x
  2. Step 2: Convert to fraction form
    101,979.60/152,910 = 39,577.20/x
  3. Step 3: Cross multiply
    101,979.60x = 152,910 × 39,577.20
  4. Step 4: Simplify right side
    101,979.60x = 6,051,749,652
  5. Step 5: Solve for x
    x = 6,051,749,652/101,979.60
  6. Step 6: Final answer
    x = 59,342.75

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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.