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Finding the Fourth Proportional to 108,971.40, 163,019.70 and 94,342.80

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Solution

The fourth proportional to 108,971.40, 163,019.70 and 94,342.80 is: 141,135.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,971.40 : 163,019.70 = 94,342.80 : x
  2. Step 2: Convert to fraction form
    108,971.40/163,019.70 = 94,342.80/x
  3. Step 3: Cross multiply
    108,971.40x = 163,019.70 × 94,342.80
  4. Step 4: Simplify right side
    108,971.40x = 15,379,734,953.16
  5. Step 5: Solve for x
    x = 15,379,734,953.16/108,971.40
  6. Step 6: Final answer
    x = 141,135.52

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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.