Home / 128,880.28-193,461.85-102,396.50

Finding the Fourth Proportional to 128,880.28, 193,461.85 and 102,396.50

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Solution

The fourth proportional to 128,880.28, 193,461.85 and 102,396.50 is: 153,707.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,880.28 : 193,461.85 = 102,396.50 : x
  2. Step 2: Convert to fraction form
    128,880.28/193,461.85 = 102,396.50/x
  3. Step 3: Cross multiply
    128,880.28x = 193,461.85 × 102,396.50
  4. Step 4: Simplify right side
    128,880.28x = 19,809,817,297.92
  5. Step 5: Solve for x
    x = 19,809,817,297.92/128,880.28
  6. Step 6: Final answer
    x = 153,707.12

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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.