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Finding the Fourth Proportional to 108,553.80, 162,830.70 and 91,057.80

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Solution

The fourth proportional to 108,553.80, 162,830.70 and 91,057.80 is: 136,586.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,553.80 : 162,830.70 = 91,057.80 : x
  2. Step 2: Convert to fraction form
    108,553.80/162,830.70 = 91,057.80/x
  3. Step 3: Cross multiply
    108,553.80x = 162,830.70 × 91,057.80
  4. Step 4: Simplify right side
    108,553.80x = 14,827,005,314.46
  5. Step 5: Solve for x
    x = 14,827,005,314.46/108,553.80
  6. Step 6: Final answer
    x = 136,586.70

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1.5x scale

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.