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Finding the Fourth Proportional to 185,247.28, 277,980 and 128,365.84

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Solution

The fourth proportional to 185,247.28, 277,980 and 128,365.84 is: 192,624.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,247.28 : 277,980 = 128,365.84 : x
  2. Step 2: Convert to fraction form
    185,247.28/277,980 = 128,365.84/x
  3. Step 3: Cross multiply
    185,247.28x = 277,980 × 128,365.84
  4. Step 4: Simplify right side
    185,247.28x = 35,683,136,203.20
  5. Step 5: Solve for x
    x = 35,683,136,203.20/185,247.28
  6. Step 6: Final answer
    x = 192,624.35

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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.