Home / 78,143.63-116,529.09-77,433.15

Finding the Fourth Proportional to 78,143.63, 116,529.09 and 77,433.15

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Solution

The fourth proportional to 78,143.63, 116,529.09 and 77,433.15 is: 115,469.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,143.63 : 116,529.09 = 77,433.15 : x
  2. Step 2: Convert to fraction form
    78,143.63/116,529.09 = 77,433.15/x
  3. Step 3: Cross multiply
    78,143.63x = 116,529.09 × 77,433.15
  4. Step 4: Simplify right side
    78,143.63x = 9,023,214,505.33
  5. Step 5: Solve for x
    x = 9,023,214,505.33/78,143.63
  6. Step 6: Final answer
    x = 115,469.62

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1.5x scale

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.