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Finding the Fourth Proportional to 91,985.92, 137,954.16 and 25,410.40

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Solution

The fourth proportional to 91,985.92, 137,954.16 and 25,410.40 is: 38,108.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,985.92 : 137,954.16 = 25,410.40 : x
  2. Step 2: Convert to fraction form
    91,985.92/137,954.16 = 25,410.40/x
  3. Step 3: Cross multiply
    91,985.92x = 137,954.16 × 25,410.40
  4. Step 4: Simplify right side
    91,985.92x = 3,505,470,387.26
  5. Step 5: Solve for x
    x = 3,505,470,387.26/91,985.92
  6. Step 6: Final answer
    x = 38,108.77

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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.