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Finding the Fourth Proportional to 42,641.80, 63,962.70 and 27,128.20

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Solution

The fourth proportional to 42,641.80, 63,962.70 and 27,128.20 is: 40,692.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,641.80 : 63,962.70 = 27,128.20 : x
  2. Step 2: Convert to fraction form
    42,641.80/63,962.70 = 27,128.20/x
  3. Step 3: Cross multiply
    42,641.80x = 63,962.70 × 27,128.20
  4. Step 4: Simplify right side
    42,641.80x = 1,735,192,918.14
  5. Step 5: Solve for x
    x = 1,735,192,918.14/42,641.80
  6. Step 6: Final answer
    x = 40,692.30

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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.