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Finding the Fourth Proportional to 187,215.60, 280,824.60 and 74,905.20

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Solution

The fourth proportional to 187,215.60, 280,824.60 and 74,905.20 is: 112,358.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,215.60 : 280,824.60 = 74,905.20 : x
  2. Step 2: Convert to fraction form
    187,215.60/280,824.60 = 74,905.20/x
  3. Step 3: Cross multiply
    187,215.60x = 280,824.60 × 74,905.20
  4. Step 4: Simplify right side
    187,215.60x = 21,035,222,827.92
  5. Step 5: Solve for x
    x = 21,035,222,827.92/187,215.60
  6. Step 6: Final answer
    x = 112,358.28

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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.