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Finding the Fourth Proportional to 78,487.93, 117,735.98 and 25,901.51

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Solution

The fourth proportional to 78,487.93, 117,735.98 and 25,901.51 is: 38,853.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,487.93 : 117,735.98 = 25,901.51 : x
  2. Step 2: Convert to fraction form
    78,487.93/117,735.98 = 25,901.51/x
  3. Step 3: Cross multiply
    78,487.93x = 117,735.98 × 25,901.51
  4. Step 4: Simplify right side
    78,487.93x = 3,049,539,828.16
  5. Step 5: Solve for x
    x = 3,049,539,828.16/78,487.93
  6. Step 6: Final answer
    x = 38,853.62

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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.