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Finding the Fourth Proportional to 115,420.43, 173,191.59 and 81,903.02

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Solution

The fourth proportional to 115,420.43, 173,191.59 and 81,903.02 is: 122,897.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,420.43 : 173,191.59 = 81,903.02 : x
  2. Step 2: Convert to fraction form
    115,420.43/173,191.59 = 81,903.02/x
  3. Step 3: Cross multiply
    115,420.43x = 173,191.59 × 81,903.02
  4. Step 4: Simplify right side
    115,420.43x = 14,184,913,393.64
  5. Step 5: Solve for x
    x = 14,184,913,393.64/115,420.43
  6. Step 6: Final answer
    x = 122,897.77

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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.