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Finding the Fourth Proportional to 151,389.76, 208,927.20 and 84,321.76

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Solution

The fourth proportional to 151,389.76, 208,927.20 and 84,321.76 is: 116,369.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,389.76 : 208,927.20 = 84,321.76 : x
  2. Step 2: Convert to fraction form
    151,389.76/208,927.20 = 84,321.76/x
  3. Step 3: Cross multiply
    151,389.76x = 208,927.20 × 84,321.76
  4. Step 4: Simplify right side
    151,389.76x = 17,617,109,215.87
  5. Step 5: Solve for x
    x = 17,617,109,215.87/151,389.76
  6. Step 6: Final answer
    x = 116,369.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.