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Finding the Fourth Proportional to 42,005.40, 62,904.64 and 27,168.88

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Solution

The fourth proportional to 42,005.40, 62,904.64 and 27,168.88 is: 40,686.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,005.40 : 62,904.64 = 27,168.88 : x
  2. Step 2: Convert to fraction form
    42,005.40/62,904.64 = 27,168.88/x
  3. Step 3: Cross multiply
    42,005.40x = 62,904.64 × 27,168.88
  4. Step 4: Simplify right side
    42,005.40x = 1,709,048,615.60
  5. Step 5: Solve for x
    x = 1,709,048,615.60/42,005.40
  6. Step 6: Final answer
    x = 40,686.40

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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.