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Finding the Fourth Proportional to 69,898.79, 96,463.06 and 39,686.93

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Solution

The fourth proportional to 69,898.79, 96,463.06 and 39,686.93 is: 54,769.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,898.79 : 96,463.06 = 39,686.93 : x
  2. Step 2: Convert to fraction form
    69,898.79/96,463.06 = 39,686.93/x
  3. Step 3: Cross multiply
    69,898.79x = 96,463.06 × 39,686.93
  4. Step 4: Simplify right side
    69,898.79x = 3,828,322,227.49
  5. Step 5: Solve for x
    x = 3,828,322,227.49/69,898.79
  6. Step 6: Final answer
    x = 54,769.51

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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.