Home / 77,969.21-116,389.80-68,510.70

Finding the Fourth Proportional to 77,969.21, 116,389.80 and 68,510.70

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Solution

The fourth proportional to 77,969.21, 116,389.80 and 68,510.70 is: 102,270.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,969.21 : 116,389.80 = 68,510.70 : x
  2. Step 2: Convert to fraction form
    77,969.21/116,389.80 = 68,510.70/x
  3. Step 3: Cross multiply
    77,969.21x = 116,389.80 × 68,510.70
  4. Step 4: Simplify right side
    77,969.21x = 7,973,946,670.86
  5. Step 5: Solve for x
    x = 7,973,946,670.86/77,969.21
  6. Step 6: Final answer
    x = 102,270.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.