Home / 77,126.40-115,369.62-72,402.48

Finding the Fourth Proportional to 77,126.40, 115,369.62 and 72,402.48

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Solution

The fourth proportional to 77,126.40, 115,369.62 and 72,402.48 is: 108,303.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,126.40 : 115,369.62 = 72,402.48 : x
  2. Step 2: Convert to fraction form
    77,126.40/115,369.62 = 72,402.48/x
  3. Step 3: Cross multiply
    77,126.40x = 115,369.62 × 72,402.48
  4. Step 4: Simplify right side
    77,126.40x = 8,353,046,604.66
  5. Step 5: Solve for x
    x = 8,353,046,604.66/77,126.40
  6. Step 6: Final answer
    x = 108,303.34

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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.