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Finding the Fourth Proportional to 42,143.40, 63,215.10 and 22,411.80

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Solution

The fourth proportional to 42,143.40, 63,215.10 and 22,411.80 is: 33,617.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,143.40 : 63,215.10 = 22,411.80 : x
  2. Step 2: Convert to fraction form
    42,143.40/63,215.10 = 22,411.80/x
  3. Step 3: Cross multiply
    42,143.40x = 63,215.10 × 22,411.80
  4. Step 4: Simplify right side
    42,143.40x = 1,416,764,178.18
  5. Step 5: Solve for x
    x = 1,416,764,178.18/42,143.40
  6. Step 6: Final answer
    x = 33,617.70

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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.