Home / 315,082.12-472,620.75-78,423.22

Finding the Fourth Proportional to 315,082.12, 472,620.75 and 78,423.22

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Solution

The fourth proportional to 315,082.12, 472,620.75 and 78,423.22 is: 117,634.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,082.12 : 472,620.75 = 78,423.22 : x
  2. Step 2: Convert to fraction form
    315,082.12/472,620.75 = 78,423.22/x
  3. Step 3: Cross multiply
    315,082.12x = 472,620.75 × 78,423.22
  4. Step 4: Simplify right side
    315,082.12x = 37,064,441,053.82
  5. Step 5: Solve for x
    x = 37,064,441,053.82/315,082.12
  6. Step 6: Final answer
    x = 117,634.23

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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.