Home / 78,420.16-117,564.10-34,013.46

Finding the Fourth Proportional to 78,420.16, 117,564.10 and 34,013.46

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Solution

The fourth proportional to 78,420.16, 117,564.10 and 34,013.46 is: 50,991.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,420.16 : 117,564.10 = 34,013.46 : x
  2. Step 2: Convert to fraction form
    78,420.16/117,564.10 = 34,013.46/x
  3. Step 3: Cross multiply
    78,420.16x = 117,564.10 × 34,013.46
  4. Step 4: Simplify right side
    78,420.16x = 3,998,762,359.94
  5. Step 5: Solve for x
    x = 3,998,762,359.94/78,420.16
  6. Step 6: Final answer
    x = 50,991.51

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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.