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Finding the Fourth Proportional to 42,603.80, 63,905.70 and 27,090.20

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Solution

The fourth proportional to 42,603.80, 63,905.70 and 27,090.20 is: 40,635.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,603.80 : 63,905.70 = 27,090.20 : x
  2. Step 2: Convert to fraction form
    42,603.80/63,905.70 = 27,090.20/x
  3. Step 3: Cross multiply
    42,603.80x = 63,905.70 × 27,090.20
  4. Step 4: Simplify right side
    42,603.80x = 1,731,218,194.14
  5. Step 5: Solve for x
    x = 1,731,218,194.14/42,603.80
  6. Step 6: Final answer
    x = 40,635.30

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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.