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Finding the Fourth Proportional to 42,411.20, 63,616.80 and 26,664.80

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Solution

The fourth proportional to 42,411.20, 63,616.80 and 26,664.80 is: 39,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,411.20 : 63,616.80 = 26,664.80 : x
  2. Step 2: Convert to fraction form
    42,411.20/63,616.80 = 26,664.80/x
  3. Step 3: Cross multiply
    42,411.20x = 63,616.80 × 26,664.80
  4. Step 4: Simplify right side
    42,411.20x = 1,696,329,248.64
  5. Step 5: Solve for x
    x = 1,696,329,248.64/42,411.20
  6. Step 6: Final answer
    x = 39,997.20

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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.