Home / 78,257.18-117,402.80-25,664.69

Finding the Fourth Proportional to 78,257.18, 117,402.80 and 25,664.69

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Solution

The fourth proportional to 78,257.18, 117,402.80 and 25,664.69 is: 38,502.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,257.18 : 117,402.80 = 25,664.69 : x
  2. Step 2: Convert to fraction form
    78,257.18/117,402.80 = 25,664.69/x
  3. Step 3: Cross multiply
    78,257.18x = 117,402.80 × 25,664.69
  4. Step 4: Simplify right side
    78,257.18x = 3,013,106,632.32
  5. Step 5: Solve for x
    x = 3,013,106,632.32/78,257.18
  6. Step 6: Final answer
    x = 38,502.62

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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.