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Finding the Fourth Proportional to 115,681.71, 159,644.01 and 64,696.35

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Solution

The fourth proportional to 115,681.71, 159,644.01 and 64,696.35 is: 89,282.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,681.71 : 159,644.01 = 64,696.35 : x
  2. Step 2: Convert to fraction form
    115,681.71/159,644.01 = 64,696.35/x
  3. Step 3: Cross multiply
    115,681.71x = 159,644.01 × 64,696.35
  4. Step 4: Simplify right side
    115,681.71x = 10,328,384,746.36
  5. Step 5: Solve for x
    x = 10,328,384,746.36/115,681.71
  6. Step 6: Final answer
    x = 89,282.78

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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.