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Finding the Fourth Proportional to 153,935.56, 212,429.02 and 85,953.68

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Solution

The fourth proportional to 153,935.56, 212,429.02 and 85,953.68 is: 118,614.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,935.56 : 212,429.02 = 85,953.68 : x
  2. Step 2: Convert to fraction form
    153,935.56/212,429.02 = 85,953.68/x
  3. Step 3: Cross multiply
    153,935.56x = 212,429.02 × 85,953.68
  4. Step 4: Simplify right side
    153,935.56x = 18,259,056,007.79
  5. Step 5: Solve for x
    x = 18,259,056,007.79/153,935.56
  6. Step 6: Final answer
    x = 118,614.93

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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.