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Finding the Fourth Proportional to 42,681.80, 64,022.70 and 27,168.20

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Solution

The fourth proportional to 42,681.80, 64,022.70 and 27,168.20 is: 40,752.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,681.80 : 64,022.70 = 27,168.20 : x
  2. Step 2: Convert to fraction form
    42,681.80/64,022.70 = 27,168.20/x
  3. Step 3: Cross multiply
    42,681.80x = 64,022.70 × 27,168.20
  4. Step 4: Simplify right side
    42,681.80x = 1,739,381,518.14
  5. Step 5: Solve for x
    x = 1,739,381,518.14/42,681.80
  6. Step 6: Final answer
    x = 40,752.30

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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.