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Finding the Fourth Proportional to 315,012.72, 472,520.76 and 78,355.32

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Solution

The fourth proportional to 315,012.72, 472,520.76 and 78,355.32 is: 117,533.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,012.72 : 472,520.76 = 78,355.32 : x
  2. Step 2: Convert to fraction form
    315,012.72/472,520.76 = 78,355.32/x
  3. Step 3: Cross multiply
    315,012.72x = 472,520.76 × 78,355.32
  4. Step 4: Simplify right side
    315,012.72x = 37,024,515,356.44
  5. Step 5: Solve for x
    x = 37,024,515,356.44/315,012.72
  6. Step 6: Final answer
    x = 117,533.40

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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.