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Finding the Fourth Proportional to 315,012.89, 472,521.03 and 78,355.56

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Solution

The fourth proportional to 315,012.89, 472,521.03 and 78,355.56 is: 117,533.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,012.89 : 472,521.03 = 78,355.56 : x
  2. Step 2: Convert to fraction form
    315,012.89/472,521.03 = 78,355.56/x
  3. Step 3: Cross multiply
    315,012.89x = 472,521.03 × 78,355.56
  4. Step 4: Simplify right side
    315,012.89x = 37,024,649,917.43
  5. Step 5: Solve for x
    x = 37,024,649,917.43/315,012.89
  6. Step 6: Final answer
    x = 117,533.76

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1.5x scale

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.