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Finding the Fourth Proportional to 108,729.90, 150,047.79 and 60,985.80

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Solution

The fourth proportional to 108,729.90, 150,047.79 and 60,985.80 is: 84,160.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,729.90 : 150,047.79 = 60,985.80 : x
  2. Step 2: Convert to fraction form
    108,729.90/150,047.79 = 60,985.80/x
  3. Step 3: Cross multiply
    108,729.90x = 150,047.79 × 60,985.80
  4. Step 4: Simplify right side
    108,729.90x = 9,150,784,511.38
  5. Step 5: Solve for x
    x = 9,150,784,511.38/108,729.90
  6. Step 6: Final answer
    x = 84,160.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.